Cell-free marginal layer model
Space tethers are cables, usually long and very strong, which can be used for propulsion, stabilization, or maintaining the formation of space systems by determining the trajectory of spacecraft and payloads.[1] Depending on the mission objectives and altitude, spaceflight using this form of spacecraft propulsion may be significantly less expensive than spaceflight using rocket engines.
Four main techniques for employing space tethers are in development:[2][3]
- This is a conductive tether that carries a current that can generate thrust or drag from a planetary magnetic field, in much the same way as an electric motor.
- This is a rotating tether that would grab a spacecraft and then release it at later time. Doing this can transfer momentum and energy from the tether to and from the spacecraft with very little loss; this can be used for orbital maneuvering.
- This is typically a non-conductive tether that accurately maintains a set distance between space vehicles.
- A form of solar wind sail with electrically charged tethers that will be pushed by the momentum of solar wind ions.
Many uses for space tethers have been proposed, including deployment as space elevators and for doing propellant-free orbital transfers.
History
Tsiolkovsky once proposed a tower so tall that it reached into space, so that it would be held there by the rotation of the Earth. However, at the time, there was no realistic way to build it.
To try to solve the problems in Komsomolskaya Pravda (July 31, 1960), another Russian, Yuri Artsutanov, wrote in greater detail about the idea of a tensile cable to be deployed from a geosynchronous satellite, downwards towards the ground, and upwards away, keeping the cable balanced. This is the space elevator idea, a type of synchronous tether that would rotate with the earth. However, given the materials technology of the time, this too was impractical on Earth.
In the 1970s, Jerome Pearson independently conceived the idea of a space elevator, sometimes referred to as a synchronous tether,[4] and, in particular, analyzed a lunar elevator that can go through the L1 and L2 points, and this was found to be possible with materials then existing.
In 1977, Hans Moravec[5] and later Robert L. Forward investigated the physics of non-synchronous skyhooks, also known as rotating skyhooks, and performed detailed simulations of tapered rotating tethers that could pick objects off of, and place objects onto, the Moon, Mars and other planets, with little loss, or even a net gain of energy.[6][7]
In 1979, NASA examined the feasibility of the idea and gave direction to the study of tethered systems, especially tethered satellites.[1][8] In 2000, NASA and Boeing considered a HASTOL concept, where a tether would take payloads from a hypersonic aircraft (at half of orbital velocity) to orbit.[9]
Missions
Mining Engineer (Excluding Oil ) Truman from Alma, loves to spend time knotting, largest property developers in singapore developers in singapore and stamp collecting. Recently had a family visit to Urnes Stave Church.
A tether satellite is a satellite connected to another by a space tether.
Tether satellites can be used for various purposes, including research into tether propulsion, tidal stabilisation and orbital plasma dynamics.
A number of tether satellites have been launched, with varying degrees of success.
Types
There are many different (and overlapping) types of tether.
Momentum exchange
Mining Engineer (Excluding Oil ) Truman from Alma, loves to spend time knotting, largest property developers in singapore developers in singapore and stamp collecting. Recently had a family visit to Urnes Stave Church.
Momentum exchange tethers are one of many applications for space tethers. This subset represents an entire area of research using a spinning conductive and/or non-conductive tether to throw spacecraft up or down in orbit (like a sling), thereby transferring (or taking) its momentum.
The act of spinning a long tether end-for-end creates a controlled acceleration on the end-masses of the system and a tension in the tether. This spin is manipulated by control of the angular frequency. From this, momentum exchange can occur if an end body is released at the right point during the controlled rotation. The transfer in momentum to the released object will cause the tether system to lose (or gain) orbital energy, and lose (or gain) altitude (and may require reboosting) or change orbital planes; and the opposite to happen to the released mass.
When in a magnetic field, such as in low Earth orbit, when using an electrodynamic tether, it is possible to re-boost without the expenditure of consumables. An electrodynamic tether was profiled in the documentary film Orphans of Apollo as technology that was to be used to keep the Russian space station Mir in orbit.[10][11] Other schemes involve balancing the momentum flow (such as catching and releasing payloads at almost the same time) or using conventional rocket propulsion or ion drives.
Electrodynamic
Mining Engineer (Excluding Oil ) Truman from Alma, loves to spend time knotting, largest property developers in singapore developers in singapore and stamp collecting. Recently had a family visit to Urnes Stave Church.
Electrodynamic tethers are long conducting wires, such as one deployed from a tether satellite, which can operate on electromagnetic principles as generators, by converting their kinetic energy to electrical energy, or as motors, converting electrical energy to kinetic energy.[1] Electric potential is generated across a conductive tether by its motion through the earth's magnetic field. The choice of the metal conductor to be used in an electrodynamic tether is determined by a variety of factors. Primary factors usually include high electrical conductivity and low density. Secondary factors, depending on the application, include cost, strength, and melting point.
Formation flying
Mining Engineer (Excluding Oil ) Truman from Alma, loves to spend time knotting, largest property developers in singapore developers in singapore and stamp collecting. Recently had a family visit to Urnes Stave Church.
This is the use of a (typically) non-conductive tether to connect multiple spacecraft.
Space environment
Gravitational gradient stabilization
Mining Engineer (Excluding Oil ) Truman from Alma, loves to spend time knotting, largest property developers in singapore developers in singapore and stamp collecting. Recently had a family visit to Urnes Stave Church.
Instead of rotating end for end, tethers can also be kept straight by the slight difference in the strength of gravity over their length.
A non-rotating tether system has a stable orientation that is aligned along the local vertical (of the earth or other body). This can be understood by inspection of the figure below where two spacecraft at two different altitudes have been connected by a tether. Normally, each spacecraft would have a balance of gravitational (e.g. Fg1) and centrifugal (e.g. Fc1), but when tied together by a tether, these values begin to change with respect to one another. This phenomenon occurs because, without the tether, the higher-altitude mass would travel slower than the lower mass. The system must move at a single speed, so the tether must therefore slow down the lower mass and speed up the upper one. The centrifugal force of the tethered upper body is increased, while that of the lower-altitude body is reduced. This results in the centrifugal force of the upper body and the gravitational force of the lower body being dominant. This difference in forces naturally aligns the system along the local vertical, as seen in the figure.[12]
Atomic oxygen
DTZ gives a comprehensive integrated property and services administration resolution for buyers, corporate house for sale In singapore owners, management firms and occupiers of property whatever their needs with the only goal of optimising and enhancing the investment worth of their property. We at the moment make use of a staff of more than 70 skilled staffs who are well-trained and dedicated to collectively achieving our purchasers' objectives.
Actual estate agency specialising in non-public condos and landed properties island vast. 10 Winstedt Highway, District 10, #01-thirteen, Singapore 227977. Property providers for enterprise relocation. Situated at 371 Beach Street, #19-10 KeyPoint, Singapore 199597. Property agents for homes, town houses, landed property, residences and condominium for sales and rentals of properties. Administration letting services for property homeowners. is there a single authority in singapore who regulates real property agents that i can file a complaint with for unethical behaviour? or is CASE is simply route? The 188 pages of Secrets and techniques of Singapore Property Gurus are full of professional knowledge and life altering wisdom. Asian industrial property market outlook Property Listing Supervisor Property Advertising Services
Should sellers go along with an agent who claims to specialize in your space? His experience might turn out to be useful, but he is probably additionally advertising a number of models within the neighbourhood – and so they're all your rivals. Within the worst-case state of affairs, your house may be used as a "showflat" as house owner YS Liang found. "Weekend after weekend, our agent would convey a stream of individuals to speed-go to our apartment, leaving within minutes. She did not even try to promote our condominium. It felt like we were just one of the many tour stops for her clients," he complains.
Step one in direction of conducting enterprise as an actual property company in Singapore is to include an organization, or if you happen to're going the partnership or sole-proprietorship route, register your Limited Legal responsibility Partnership or sole-proprietorship with the ACRA (Accounting and Company Regulatory Authority of Singapore) Whether or not you might be considering to promote, let, hire or buy a new industrial property, we're right here to assist. Search and browse our commercial property section. Possess not less than 3 years of working expertise below a Singapore licensed real-property agency; Sale, letting and property administration and taxation companies. three Shenton Means, #10-08 Shenton Home, Singapore 068805. Real property agents for purchasing, promoting, leasing, and renting property. Caveat Search
Firstly, the events might take into account to rescind the sale and buy agreement altogether. This avenue places the contracting events to a position as if the contract didn't happen. It's as if the contract was terminated from the start and events are put back into place that they were before the contract. Any items or monies handed are returned to the respective original house owners. As the worldwide real property market turns into extra refined and worldwide real property investments will increase, the ERA real estate network is well equipped to offer professional recommendation and guidance to our shoppers in making critical actual estate decisions. Relocationg, leasing and sales of properties for housing, food and beverage, retail and workplace wants.
Pasir Panjang, Singapore - $5,000-6,000 per 30 days By likelihood one among our buddies here in Singapore is an agent and we made contact for her to help us locate an residence, which she did. days from the date of execution if the doc is signed in Singapore; Be a Singapore Citizen or PR (Permanent Resident); The regulations also prohibit property agents from referring their shoppers to moneylenders, to discourage irresponsible shopping for. Brokers are additionally prohibited from holding or dealing with money on behalf of any party in relation to the sale or purchase of any property situated in Singapore, and the lease of HDB property. - Negotiate To Close A Sale together with sale and lease of HDB and private properties) Preparing your house for sale FEATURED COMMERCIAL AGENTS Property Guides
i) registered as a patent agent or its equal in any nation or territory, or by a patent workplace, specified within the Fourth Schedule; The business-specific tips for the true property agency and telecommunication sectors have been crafted to address considerations about scenarios that particularly apply to the two sectors, the PDPC stated. Mr Steven Tan, Managing Director of OrangeTee real property company, nonetheless, felt that it was a matter of "practising until it becomes part of our knowledge". "After a while, the agents ought to know the spirit behind the (Act)," he stated. Rising office sector leads real property market efficiency, while prime retail and enterprise park segments moderate and residential sector continues in decline Please choose an attendee for donation.
Objects in low-earth orbit are subjected to noticeable erosion from monomolecular oxygen due to the high orbital speed with which the molecules strike as well as their high reactivity.
Micrometeorites and space junk
Simple single-strand tethers are susceptible to micrometeoroids and space junk. Several systems have since been proposed and tested to improve debris resistance:
- The US Naval Research Laboratory has successfully flown a long term 6 km long, 2-3mm diameter tether with an outer layer of Spectra 1000 braid and a core of acrylic yarn.[13] This satellite, the Tether Physics and Survivability Experiment (TiPS), was launched in June 1996 and remained in operation over 10 years, finally breaking in July 2006.[14]
- Dr. Robert P. Hoyt patented an engineered circular net, such that a cut strand's strains would be redistributed automatically around the severed strand. This is called a Hoytether. Hoytethers have theoretical lifetimes of decades.
- Researchers with JAXA have also proposed net-based tethers for their future missions.[15]
- Another proposal is to use a tape or cloth.
Large pieces of junk would still cut most tethers, including the improved versions listed hereinbefore, but these are currently tracked on radar and have predictable orbits. A tether could be wiggled to dodge known pieces of junk, or thrusters used to change the orbit, avoiding a collision.
Construction
Properties of useful materials
Tether properties and materials are dependent on the application. However, there are some common properties. To achieve maximum performance and low cost, tethers need to be made of materials with the combination of high strength or electrical conductivity and low density. All space tethers are susceptible to space debris or micrometeroids. Therefore, mission designers need to decide whether or not a protective coating is needed, including if against UV and atomic oxygen. Research is being conducted to assess the probability of a collision that would damage the tether MAST.
For applications that exert high tensile forces on the tether, the materials need to be strong and light. Some current tether designs use crystalline plastics such as ultra high molecular weight polyethylene, aramid or carbon fiber. A possible future material would be carbon nanotubes, which have an estimated tensile strength between 140 and 177 GPa (20.3-25.6 million psi), and a proven tensile strength in the range 50-60 GPa for some individual nanotubes. (A number of other materials obtain 10 to 20 GPa in some samples on the nano scale, but translating such strengths to the macro scale has been challenging so far, with, as of 2011, CNT-based ropes being an order of magnitude less strong, not yet stronger than more conventional carbon fiber on that scale).[16][17][18]
For some applications, the tensile force on the tether is less than 15 lbs (< 65 N)[19] Material selection in this case depends on the purpose of the mission and design constraints. Electrodynamic tethers, such as the one used on TSS-1R, may use thin copper wires for high conductivity (see EDT).
There are design equations for certain applications that can identify typical quantities that drive material selection.
Space elevator equations typically use a "characteristic length", Lc, which is also known as its "self-support length" and is the length of untapered cable it can support in a constant 1 g gravity field.
where σ is the stress limit (in pressure units) and ρ is the density of the material.
Hypersonic skyhook equations use the material's "specific velocity" which is equal to the maximum tangential velocity a spinning hoop can attain without breaking:
For rotating tethers (rotovators) the value used is the material’s ‘characteristic velocity’ which is the maximum tip velocity a rotating untapered cable can attain without breaking,
The characteristic velocity equals the specific velocity multiplied by the square root of two.
These values are used in equations similar to the rocket equation and are analogous to specific impulse or exhaust velocity. The higher these values are, the more efficient and lighter the tether can be in relation to the payloads that they can carry. Eventually however, the mass of the tether propulsion system will be limited at the low end by other factors such as momentum storage.
Practical materials
Materials proposed include Kevlar, ultra high molecular weight polyethylene, carbon nanotubes, M5 fiber, and diamond.
One material that has great potential is M5 fiber. This is a synthetic fiber that is lighter than Kevlar or Spectra.[20] According to Pearson, Levin, Oldson, and Wykes in their article "The Lunar Space Elevator", an M5 ribbon 30 mm wide and 0.023 mm thick, would be able to support 2000 kg on the lunar surface (2005). It would also be able to hold 100 cargo vehicles, each with a mass of 580 kg, evenly spaced along the length of the elevator.[4] Other materials that could be used are T1000G carbon fiber, Spectra 2000, or Zylon.[21] All of these materials have breaking lengths of several hundred kilometers under 1 g (10 m/s²).[4]
Material | Density ρ (kg/m³) |
Stress limit σ (GPa) |
Characteristic length Lc = σ/ρg (km) |
Specific velocity Vs = √(σ/ρ) (km/s) |
Char. velocity Vc = √(2σ/ρ) (km/s) |
---|---|---|---|---|---|
Single-wall carbon nanotubes (individual nanotubes in lab) | 2266 | 50 | 2200 | 4.7 | 6.6 |
Aramid, polybenzoxazole (PBO) fiber ("Zylon")[21] | 1340 | 5.9 | 450 | 2.1 | 3.0 |
Toray carbon fiber (T1000G) | 1810 | 6.4 | 360 | 1.9 | 2.7 |
Magellan honeycomb polymer M5 (planned values) | 1700 | 9.5 | 570 | 2.4 | 3.3 |
Magellan honeycomb polymer M5 (existing) | 1700 | 5.7 | 340 | 1.8 | 2.6 |
Honeywell extended chain polyethylene fiber (Spectra 2000) | 970 | 3.0 | 316 | 1.8 | 2.5 |
DuPont Aramid fiber (Kevlar 49) | 1440 | 3.6 | 255 | 1.6 | 2.2 |
Specialty materials e.g. silicon carbide | 3000 | 5.9 | 199 | 1.4 | 2.0 |
Piano wire | 8000 | 5 | 63 | 0.79 | 1.1 |
Aluminium (6061 T6) | 2700 | 0.276 | 10 | 0.32 | 0.45 |
Shape
Tapering
For gravity stabilised tethers, to exceed the self-support length the tether material can be tapered so that the cross-sectional area varies with the total load at each point along the length of the cable. In practice this means that the central tether structure needs to be thicker than the tips. Correct tapering ensures that the tensile stress at every point in the cable is exactly the same. For very demanding applications, such as an Earth space elevator, the tapering can result in excessive ratios of cable weight to payload weight.
Thickness
For rotating tethers not significantly affected by gravity, the thickness also varies, and it can be shown that the area, A, is given as a function of r (the distance from the centre) as follows:[22]
where R is the radius of tether, v is the velocity with respect to the centre, M is the tip mass, is the material density, and T is the design tensile strength (Young's modulus divided by safety factor).
Mass ratio
Integrating the area to give the volume and multiplying by the density and dividing by the payload mass gives a payload mass / tether mass ratio of:[22]
where erf is the normal probability error function.
then:[23]
This equation can be compared with the rocket equation, which is proportional to a simple exponent on a velocity, rather than a velocity squared. This difference effectively limits the delta-v that can be obtained from a single tether.
Redundancy
In addition the cable shape must be constructed to withstand micrometeorites and space junk. This can be achieved with the use of redundant cables, such as the Hoytether; redundancy can ensure that it is very unlikely that multiple redundant cables would be damaged near the same point on the cable, and hence a very large amount of total damage can occur over different parts of the cable before failure occurs.
Material strength
Beanstalks and rotovators are currently limited by the strengths of available materials. Although ultra-high strength plastic fibers (Kevlar and Spectra) permit rotovators to pluck masses from the surface of the Moon and Mars, a rotovator from these materials cannot lift from the surface of the Earth. In theory, high flying, supersonic (or hypersonic) aircraft could deliver a payload to a rotovator that dipped into Earth's upper atmosphere briefly at predictable locations throughout the tropic (and temperate) zone of Earth.
Cargo capture
Cargo capture for rotovators is nontrivial, and failure to capture can cause problems. Several systems have been proposed, such as shooting nets at the cargo, but all add weight, complexity, and another failure mode. At least one lab scale demonstration of a working grapple system has been achieved however.[24]
Life expectancy
Currently, the strongest materials in tension are plastics that require a coating for protection from UV radiation and (depending on the orbit) erosion by atomic oxygen. Disposal of waste heat is difficult in a vacuum, so overheating may cause tether failures or damage.
Control and modelling
Pendular motion instability
Electrodynamic tethers deployed along the local vertical ('hanging tethers') may suffer from dynamical instability. Pendular motion causes the tether vibration amplitude to build up under the action of electromagnetic interaction. As the mission time increases, this behavior can compromise the performance of the system. Over a few weeks, electrodynamic tethers in Earth orbit might build up vibrations in many modes, as their orbit interacts with irregularities in magnetic and gravitational fields.
One plan to control the vibrations is to actively vary the tether current to counteract the growth of the vibrations. Electrodynamic tethers can be stabilized by reducing their current when it would feed the oscillations, and increasing it when it opposes oscillations. Simulations have demonstrated that this can control tether vibration.Potter or Ceramic Artist Truman Bedell from Rexton, has interests which include ceramics, best property developers in singapore developers in singapore and scrabble. Was especially enthused after visiting Alejandro de Humboldt National Park. This approach requires sensors to measure tether vibrations, which can either be an inertial navigation system on one end of the tether, or satellite navigation systems mounted on the tether, transmitting their positions to a receiver on the end.
Another proposed method is to use spinning electrodynamic tethers instead of hanging tethers. The gyroscopic effect provides passive stabilisation, avoiding the instability.
Surges
As mentioned earlier, conductive tethers have failed from unexpected current surges. Unexpected electrostatic discharges have cut tethers (e.g. see Tethered Satellite System Reflight (TSS‑1R) on STS‑75), damaged electronics, and welded tether handling machinery. It may be that the Earth's magnetic field is not as homogeneous as some engineers have believed.
Vibrations
Computer models frequently show tethers can snap due to vibration.
Mechanical tether-handling equipment is often surprisingly heavy, with complex controls to damp vibrations. The one ton climber proposed by Dr. Brad Edwards for his Space Elevator may detect and suppress most vibrations by changing speed and direction. The climber can also repair or augment a tether by spinning more strands.
The vibration modes that may be a problem include skipping rope, transverse, longitudinal, and pendulum.[25]
Tethers are nearly always tapered, and this can greatly amplify the movement at the thinnest tip in whip-like ways.
Other issues
A tether is not a spherical object, and has significant extent. This means that as an extended object, it is not directly modelable as a point source, and this means that the center of mass and center of gravity are not usually colocated. Thus the inverse square law does not apply except at large distances, to the overall behaviour of a tether. Hence the orbits are not completely Keplerian, and in some cases they are actually chaotic.[26]
With bolus designs, rotation of the cable interacting with the non linear gravity fields found in elliptical orbits can cause exchange of orbital angular momentum and rotation angular momentum. This can make prediction and modelling extremely complex.
In fiction
The mechanics of tether propulsion are critical in resolving the climax of the book The Descent of Anansi by Steven Barnes and Larry Niven.
See also
Sportspersons Hyslop from Nicolet, usually spends time with pastimes for example martial arts, property developers condominium in singapore singapore and hot rods. Maintains a trip site and has lots to write about after touring Gulf of Porto: Calanche of Piana.
- Spacecraft propulsion
- Non-rocket spacelaunch
- Orbital ring — a ring around the Earth
References
43 year old Petroleum Engineer Harry from Deep River, usually spends time with hobbies and interests like renting movies, property developers in singapore new condominium and vehicle racing. Constantly enjoys going to destinations like Camino Real de Tierra Adentro.
External links
Text
- ProSEDS, a tether-based propulsion experiment
- Special Projects Group
- NASA tether overview
- Tethers Unlimited Incorporated
- "Tethers In Space Handbook" M. L. Cosmo and E. C. Lorenzini third edition December 1997
- NASA IAC report on orbital systems
- SpaceTethers.com, space tether simulator applet
- USA National Public Radio - Space Tethers: Slinging Objects in Orbit?
- ESA - The YES2 project
- ESA - Students test 'space postal service' during Foton mission
- The Space Show #531 Robert P. Hoyt discusses space tethers on the Space Show
- NASA site on TSS-1R
- NASA Tether Origami
- New Scientist article
- Tether Physics and Survivability Experiment
- Tethers Unlimited • Publications
- Tethers in Space Handbook (PDF)
- Tethers in Space, a propellantless propulsion in-orbit demonstration, ISBN 978-90-8891-282-5
Video
Template:Spacecraft propulsion
eo:Katenita satelito fr:Satellite captif it:Satellite Tethered
- ↑ 1.0 1.1 1.2 NASA, Tethers In Space Handbook, edited by M. L. Cosmo and E. C. Lorenzini, third edition December 1997 (accessed 20 October 2010); see also version of NASA MSFC;
available on scribd www.scribd.com Cite error: Invalid
<ref>
tag; name "handbook" defined multiple times with different content - ↑ One of the biggest reasons investing in a Singapore new launch is an effective things is as a result of it is doable to be lent massive quantities of money at very low interest rates that you should utilize to purchase it. Then, if property values continue to go up, then you'll get a really high return on funding (ROI). Simply make sure you purchase one of the higher properties, reminiscent of the ones at Fernvale the Riverbank or any Singapore landed property Get Earnings by means of Renting
In its statement, the singapore property listing - website link, government claimed that the majority citizens buying their first residence won't be hurt by the new measures. Some concessions can even be prolonged to chose teams of consumers, similar to married couples with a minimum of one Singaporean partner who are purchasing their second property so long as they intend to promote their first residential property. Lower the LTV limit on housing loans granted by monetary establishments regulated by MAS from 70% to 60% for property purchasers who are individuals with a number of outstanding housing loans on the time of the brand new housing purchase. Singapore Property Measures - 30 August 2010 The most popular seek for the number of bedrooms in Singapore is 4, followed by 2 and three. Lush Acres EC @ Sengkang
Discover out more about real estate funding in the area, together with info on international funding incentives and property possession. Many Singaporeans have been investing in property across the causeway in recent years, attracted by comparatively low prices. However, those who need to exit their investments quickly are likely to face significant challenges when trying to sell their property – and could finally be stuck with a property they can't sell. Career improvement programmes, in-house valuation, auctions and administrative help, venture advertising and marketing, skilled talks and traisning are continuously planned for the sales associates to help them obtain better outcomes for his or her shoppers while at Knight Frank Singapore. No change Present Rules
Extending the tax exemption would help. The exemption, which may be as a lot as $2 million per family, covers individuals who negotiate a principal reduction on their existing mortgage, sell their house short (i.e., for lower than the excellent loans), or take part in a foreclosure course of. An extension of theexemption would seem like a common-sense means to assist stabilize the housing market, but the political turmoil around the fiscal-cliff negotiations means widespread sense could not win out. Home Minority Chief Nancy Pelosi (D-Calif.) believes that the mortgage relief provision will be on the table during the grand-cut price talks, in response to communications director Nadeam Elshami. Buying or promoting of blue mild bulbs is unlawful.
A vendor's stamp duty has been launched on industrial property for the primary time, at rates ranging from 5 per cent to 15 per cent. The Authorities might be trying to reassure the market that they aren't in opposition to foreigners and PRs investing in Singapore's property market. They imposed these measures because of extenuating components available in the market." The sale of new dual-key EC models will even be restricted to multi-generational households only. The models have two separate entrances, permitting grandparents, for example, to dwell separately. The vendor's stamp obligation takes effect right this moment and applies to industrial property and plots which might be offered inside three years of the date of buy. JLL named Best Performing Property Brand for second year running
The data offered is for normal info purposes only and isn't supposed to be personalised investment or monetary advice. Motley Fool Singapore contributor Stanley Lim would not personal shares in any corporations talked about. Singapore private home costs increased by 1.eight% within the fourth quarter of 2012, up from 0.6% within the earlier quarter. Resale prices of government-built HDB residences which are usually bought by Singaporeans, elevated by 2.5%, quarter on quarter, the quickest acquire in five quarters. And industrial property, prices are actually double the levels of three years ago. No withholding tax in the event you sell your property. All your local information regarding vital HDB policies, condominium launches, land growth, commercial property and more
There are various methods to go about discovering the precise property. Some local newspapers (together with the Straits Instances ) have categorised property sections and many local property brokers have websites. Now there are some specifics to consider when buying a 'new launch' rental. Intended use of the unit Every sale begins with 10 p.c low cost for finish of season sale; changes to 20 % discount storewide; follows by additional reduction of fiftyand ends with last discount of 70 % or extra. Typically there is even a warehouse sale or transferring out sale with huge mark-down of costs for stock clearance. Deborah Regulation from Expat Realtor shares her property market update, plus prime rental residences and houses at the moment available to lease Esparina EC @ Sengkang - ↑ One of the biggest reasons investing in a Singapore new launch is an effective things is as a result of it is doable to be lent massive quantities of money at very low interest rates that you should utilize to purchase it. Then, if property values continue to go up, then you'll get a really high return on funding (ROI). Simply make sure you purchase one of the higher properties, reminiscent of the ones at Fernvale the Riverbank or any Singapore landed property Get Earnings by means of Renting
In its statement, the singapore property listing - website link, government claimed that the majority citizens buying their first residence won't be hurt by the new measures. Some concessions can even be prolonged to chose teams of consumers, similar to married couples with a minimum of one Singaporean partner who are purchasing their second property so long as they intend to promote their first residential property. Lower the LTV limit on housing loans granted by monetary establishments regulated by MAS from 70% to 60% for property purchasers who are individuals with a number of outstanding housing loans on the time of the brand new housing purchase. Singapore Property Measures - 30 August 2010 The most popular seek for the number of bedrooms in Singapore is 4, followed by 2 and three. Lush Acres EC @ Sengkang
Discover out more about real estate funding in the area, together with info on international funding incentives and property possession. Many Singaporeans have been investing in property across the causeway in recent years, attracted by comparatively low prices. However, those who need to exit their investments quickly are likely to face significant challenges when trying to sell their property – and could finally be stuck with a property they can't sell. Career improvement programmes, in-house valuation, auctions and administrative help, venture advertising and marketing, skilled talks and traisning are continuously planned for the sales associates to help them obtain better outcomes for his or her shoppers while at Knight Frank Singapore. No change Present Rules
Extending the tax exemption would help. The exemption, which may be as a lot as $2 million per family, covers individuals who negotiate a principal reduction on their existing mortgage, sell their house short (i.e., for lower than the excellent loans), or take part in a foreclosure course of. An extension of theexemption would seem like a common-sense means to assist stabilize the housing market, but the political turmoil around the fiscal-cliff negotiations means widespread sense could not win out. Home Minority Chief Nancy Pelosi (D-Calif.) believes that the mortgage relief provision will be on the table during the grand-cut price talks, in response to communications director Nadeam Elshami. Buying or promoting of blue mild bulbs is unlawful.
A vendor's stamp duty has been launched on industrial property for the primary time, at rates ranging from 5 per cent to 15 per cent. The Authorities might be trying to reassure the market that they aren't in opposition to foreigners and PRs investing in Singapore's property market. They imposed these measures because of extenuating components available in the market." The sale of new dual-key EC models will even be restricted to multi-generational households only. The models have two separate entrances, permitting grandparents, for example, to dwell separately. The vendor's stamp obligation takes effect right this moment and applies to industrial property and plots which might be offered inside three years of the date of buy. JLL named Best Performing Property Brand for second year running
The data offered is for normal info purposes only and isn't supposed to be personalised investment or monetary advice. Motley Fool Singapore contributor Stanley Lim would not personal shares in any corporations talked about. Singapore private home costs increased by 1.eight% within the fourth quarter of 2012, up from 0.6% within the earlier quarter. Resale prices of government-built HDB residences which are usually bought by Singaporeans, elevated by 2.5%, quarter on quarter, the quickest acquire in five quarters. And industrial property, prices are actually double the levels of three years ago. No withholding tax in the event you sell your property. All your local information regarding vital HDB policies, condominium launches, land growth, commercial property and more
There are various methods to go about discovering the precise property. Some local newspapers (together with the Straits Instances ) have categorised property sections and many local property brokers have websites. Now there are some specifics to consider when buying a 'new launch' rental. Intended use of the unit Every sale begins with 10 p.c low cost for finish of season sale; changes to 20 % discount storewide; follows by additional reduction of fiftyand ends with last discount of 70 % or extra. Typically there is even a warehouse sale or transferring out sale with huge mark-down of costs for stock clearance. Deborah Regulation from Expat Realtor shares her property market update, plus prime rental residences and houses at the moment available to lease Esparina EC @ Sengkang - ↑ 4.0 4.1 4.2 4.3 Template:Cite web
- ↑ The Journal of the Astronautical Sciences, v25#4, pp. 307-322, Oct-Dec 1977
- ↑ Template:Cite webTemplate:Dead link
- ↑ Hans Moravec, "Non-Synchronous Orbital Skyhooks for the Moon and Mars with Conventional Materials" (Hans Moravec's thoughts on skyhooks, tethers, rotovators, etc., as of 1987) (accessed 10 October 2010)
- ↑ Joseph A. Carroll and John C. Oldson, “Tethers for Small Satellite Applications”, presented at the 1995 AIAA / USU Small Satellite Conference in Logan, Utah, USA (accessed 20 October 2010)
- ↑ Template:Cite web
- ↑ Template:Cite web
- ↑ One of the biggest reasons investing in a Singapore new launch is an effective things is as a result of it is doable to be lent massive quantities of money at very low interest rates that you should utilize to purchase it. Then, if property values continue to go up, then you'll get a really high return on funding (ROI). Simply make sure you purchase one of the higher properties, reminiscent of the ones at Fernvale the Riverbank or any Singapore landed property Get Earnings by means of Renting
In its statement, the singapore property listing - website link, government claimed that the majority citizens buying their first residence won't be hurt by the new measures. Some concessions can even be prolonged to chose teams of consumers, similar to married couples with a minimum of one Singaporean partner who are purchasing their second property so long as they intend to promote their first residential property. Lower the LTV limit on housing loans granted by monetary establishments regulated by MAS from 70% to 60% for property purchasers who are individuals with a number of outstanding housing loans on the time of the brand new housing purchase. Singapore Property Measures - 30 August 2010 The most popular seek for the number of bedrooms in Singapore is 4, followed by 2 and three. Lush Acres EC @ Sengkang
Discover out more about real estate funding in the area, together with info on international funding incentives and property possession. Many Singaporeans have been investing in property across the causeway in recent years, attracted by comparatively low prices. However, those who need to exit their investments quickly are likely to face significant challenges when trying to sell their property – and could finally be stuck with a property they can't sell. Career improvement programmes, in-house valuation, auctions and administrative help, venture advertising and marketing, skilled talks and traisning are continuously planned for the sales associates to help them obtain better outcomes for his or her shoppers while at Knight Frank Singapore. No change Present Rules
Extending the tax exemption would help. The exemption, which may be as a lot as $2 million per family, covers individuals who negotiate a principal reduction on their existing mortgage, sell their house short (i.e., for lower than the excellent loans), or take part in a foreclosure course of. An extension of theexemption would seem like a common-sense means to assist stabilize the housing market, but the political turmoil around the fiscal-cliff negotiations means widespread sense could not win out. Home Minority Chief Nancy Pelosi (D-Calif.) believes that the mortgage relief provision will be on the table during the grand-cut price talks, in response to communications director Nadeam Elshami. Buying or promoting of blue mild bulbs is unlawful.
A vendor's stamp duty has been launched on industrial property for the primary time, at rates ranging from 5 per cent to 15 per cent. The Authorities might be trying to reassure the market that they aren't in opposition to foreigners and PRs investing in Singapore's property market. They imposed these measures because of extenuating components available in the market." The sale of new dual-key EC models will even be restricted to multi-generational households only. The models have two separate entrances, permitting grandparents, for example, to dwell separately. The vendor's stamp obligation takes effect right this moment and applies to industrial property and plots which might be offered inside three years of the date of buy. JLL named Best Performing Property Brand for second year running
The data offered is for normal info purposes only and isn't supposed to be personalised investment or monetary advice. Motley Fool Singapore contributor Stanley Lim would not personal shares in any corporations talked about. Singapore private home costs increased by 1.eight% within the fourth quarter of 2012, up from 0.6% within the earlier quarter. Resale prices of government-built HDB residences which are usually bought by Singaporeans, elevated by 2.5%, quarter on quarter, the quickest acquire in five quarters. And industrial property, prices are actually double the levels of three years ago. No withholding tax in the event you sell your property. All your local information regarding vital HDB policies, condominium launches, land growth, commercial property and more
There are various methods to go about discovering the precise property. Some local newspapers (together with the Straits Instances ) have categorised property sections and many local property brokers have websites. Now there are some specifics to consider when buying a 'new launch' rental. Intended use of the unit Every sale begins with 10 p.c low cost for finish of season sale; changes to 20 % discount storewide; follows by additional reduction of fiftyand ends with last discount of 70 % or extra. Typically there is even a warehouse sale or transferring out sale with huge mark-down of costs for stock clearance. Deborah Regulation from Expat Realtor shares her property market update, plus prime rental residences and houses at the moment available to lease Esparina EC @ Sengkang - ↑ Cosmo, M. L., Lorenzini, E. C., "Tethers in Space Handbook", NASA Marchall Space Flight Center, 1997, pp. 274-1-274 Template:Clarify
- ↑ The minimal educational requirement to take the REA or RES examination is four GCE "" level passes or equal. When you have taken the obligatory preparatory course offered by a CEA Authorised Course Supplier and want to apply for the exam, please click on right here.
In an ordinary Singapore Tenancy Agreement, there is usually the reimbursement clause together with the diplomatic clause. This clause states that in the event you train the diplomatic clause, you will have to reimburse a part of the commission the landlord had paid to his agent. Figures additionally show that the number of property agents registered with the Council for Estate Companies (CEA) The property company watchdog mentioned property agents who did not continue with their registration were part timers Tuas South Road 5 Industrial Website on the market So the right way to be a Real Estate Agent in Singapore? Be registered with just one Licensed Estate Agent (Actual Estate Firm) Abroad Property Analysis Experiences Region Property Consultancy & Management Providers Pte Ltd UE Square (D09) – Residence For Hire
final January. There are also fewer property companies in business, down by 5% to lower than 1,500. Other than passing a compulsory examination, registered property brokers also have to endure six hours of Some business players stated new agents face a tough time juggling this and shutting property deals. With a purpose to make the TA a sound authorized document to be honoured by all parties involved, it must be stamped by the Singapore Inland Revenue Authority (IRA). The costs for this process, a so-known as "stamp obligation", are to be borne by the tenant. Softening in residential property costs proceed, led by 2.8 per cent decline within the index for Remainder of Central Area Freehold improvement in the prestigious Ardmore Park / Claymore district with potential for en bloc sale
An expert property agent in Singapore will assist you and defend your interest all through the purchase, secure the provide for you at the best possible price. With a a lot better data of Singapore, the agent can be in a greater position to recommend and recommendation on the selection of property. He may even ensure that all documents are in order and you might be coping with the rightful owner of the property. Singapore 529508 Contact Leon in OrangeTee or click here to read more if you wish to be property agent – Singapore Real Property Salesperson. Rental estate agent for condominiums, bungalows, semi-detached or public apartments in Singapore. Luxurious condo close to Somerset MRT Condominium For Sale – St Thomas Suites (D09) Singapore Contractors Affiliation Ltd Search
Freehold Condo near Orchard The Edge on Cairnhill – Condominium For Sale One-cease service for expatriate and foreign patrons. Collection of properties for lease and for sale in Singapore. Property brokers for sale or rental of properties assisting property house owners and those searching for properties to rent or buy. Residences, homes and HDB's. Blk 138 Lorong Ah Soo, Singapore 530138. Commercial and residential property real property agents. 31 Scotts Road, Dean's Property Centre, Singapore 228225. Excessive-end apartment in singapore close to Orchard Road Condominium For Sale – Paterson Residence (D09) Property agent / real estate agent coping with leasing, rental, sale and buy of business and residential properties Meet the Manager Singapore Glass Affiliation REMAX Singapore New Launches
Property companies embrace buy, sell or hire properties, financial planning, pattern forecasts, relocation, interior design and actual estate planning. Condominium For Lease – The Balmoral (D10) Shopping for a house is a large funding that calls for much consideration and research. The same applies for selling or renting a property, the place a lot effort and time should be spent in negotiating for supreme prices. To watch itemizing and transacted prices Our mistake was that we didn't have our personal agent. One that could have defined all this to us, why it was needed and so forth. But we still did not realise this at the moment, we just assumed that this agent (named A) was serving to us. Little did we know "A" was truly the homeowners agent and we had no 'declare' on him in any respect.
Vendor Pays the Buyer's Dealer Commission via his itemizing agent. Underneath a Purchaser's Broker arrangement, the named brokerage and agent represent the customer. The price paid to the broker mostly is paid by the vendor. Some buyer dealer agreements include clauses that will compensate the brokerage for the price it's due less the quantity paid by the vendor. When I managed to sell a property for my shopper at double fast time and at a really good worth. The worth was higher than most models being bought at the moment. It was a lot of onerous work and naturally Luck performed an enormous part. The Consumer was very very grateful. Sellers pay a 2% commission. May be decrease for more expensive properties. CONTACTING ME We Will Achieve Your Wants And Desires In Actual Estate - ↑ NOSS Launch Data (see NOSS 2-3, which deployed TiPS)
- ↑ One of the biggest reasons investing in a Singapore new launch is an effective things is as a result of it is doable to be lent massive quantities of money at very low interest rates that you should utilize to purchase it. Then, if property values continue to go up, then you'll get a really high return on funding (ROI). Simply make sure you purchase one of the higher properties, reminiscent of the ones at Fernvale the Riverbank or any Singapore landed property Get Earnings by means of Renting
In its statement, the singapore property listing - website link, government claimed that the majority citizens buying their first residence won't be hurt by the new measures. Some concessions can even be prolonged to chose teams of consumers, similar to married couples with a minimum of one Singaporean partner who are purchasing their second property so long as they intend to promote their first residential property. Lower the LTV limit on housing loans granted by monetary establishments regulated by MAS from 70% to 60% for property purchasers who are individuals with a number of outstanding housing loans on the time of the brand new housing purchase. Singapore Property Measures - 30 August 2010 The most popular seek for the number of bedrooms in Singapore is 4, followed by 2 and three. Lush Acres EC @ Sengkang
Discover out more about real estate funding in the area, together with info on international funding incentives and property possession. Many Singaporeans have been investing in property across the causeway in recent years, attracted by comparatively low prices. However, those who need to exit their investments quickly are likely to face significant challenges when trying to sell their property – and could finally be stuck with a property they can't sell. Career improvement programmes, in-house valuation, auctions and administrative help, venture advertising and marketing, skilled talks and traisning are continuously planned for the sales associates to help them obtain better outcomes for his or her shoppers while at Knight Frank Singapore. No change Present Rules
Extending the tax exemption would help. The exemption, which may be as a lot as $2 million per family, covers individuals who negotiate a principal reduction on their existing mortgage, sell their house short (i.e., for lower than the excellent loans), or take part in a foreclosure course of. An extension of theexemption would seem like a common-sense means to assist stabilize the housing market, but the political turmoil around the fiscal-cliff negotiations means widespread sense could not win out. Home Minority Chief Nancy Pelosi (D-Calif.) believes that the mortgage relief provision will be on the table during the grand-cut price talks, in response to communications director Nadeam Elshami. Buying or promoting of blue mild bulbs is unlawful.
A vendor's stamp duty has been launched on industrial property for the primary time, at rates ranging from 5 per cent to 15 per cent. The Authorities might be trying to reassure the market that they aren't in opposition to foreigners and PRs investing in Singapore's property market. They imposed these measures because of extenuating components available in the market." The sale of new dual-key EC models will even be restricted to multi-generational households only. The models have two separate entrances, permitting grandparents, for example, to dwell separately. The vendor's stamp obligation takes effect right this moment and applies to industrial property and plots which might be offered inside three years of the date of buy. JLL named Best Performing Property Brand for second year running
The data offered is for normal info purposes only and isn't supposed to be personalised investment or monetary advice. Motley Fool Singapore contributor Stanley Lim would not personal shares in any corporations talked about. Singapore private home costs increased by 1.eight% within the fourth quarter of 2012, up from 0.6% within the earlier quarter. Resale prices of government-built HDB residences which are usually bought by Singaporeans, elevated by 2.5%, quarter on quarter, the quickest acquire in five quarters. And industrial property, prices are actually double the levels of three years ago. No withholding tax in the event you sell your property. All your local information regarding vital HDB policies, condominium launches, land growth, commercial property and more
There are various methods to go about discovering the precise property. Some local newspapers (together with the Straits Instances ) have categorised property sections and many local property brokers have websites. Now there are some specifics to consider when buying a 'new launch' rental. Intended use of the unit Every sale begins with 10 p.c low cost for finish of season sale; changes to 20 % discount storewide; follows by additional reduction of fiftyand ends with last discount of 70 % or extra. Typically there is even a warehouse sale or transferring out sale with huge mark-down of costs for stock clearance. Deborah Regulation from Expat Realtor shares her property market update, plus prime rental residences and houses at the moment available to lease Esparina EC @ Sengkang - ↑ Nanotube Fibers
- ↑ Tensile tests of ropes of very long aligned multiwall carbon nanotubes
- ↑ Tensile Loading of Ropes of Single-Wall Carbon Nanotubes and their Mechanical Properties
- ↑ NASA, TSS-1R Mission Failure Investigation Board, Final Report, May 31, 1996 (accessed 7 April 2011)
- ↑ Bacon 2005
- ↑ 21.0 21.1 Specifications for commercially available PBO (Zylon) cable: "PBO (Zylon) The high performance fibre" (accessed Oct. 20, 2010)
- ↑ 22.0 22.1 "Tether Transport from LEO to the Lunar Surface", R. L. Forward, AIAA Paper 91-2322, 27th Joint Propulsion Conference, 1991
- ↑ Non-Synchronous Orbital Skyhooks for the Moon and Mars with Conventional Materials - Hans Moravec
- ↑ http://www.nasa.gov/centers/marshall/news/news/releases/2005/05-108.html NASA Engineers, Tennessee College Students Successfully Demonstrate Catch Mechanism for Future Space Tether
- ↑ Tether dynamics
- ↑ http://www.academia.edu/3453325/Ultra_Long_Orbital_Tethers_Behave_Highly_Non-Keplerian_and_Unstable Ultra Long Orbital WSEAS TRANSACTIONS on MATHEMATICS: Tethers Behave Highly Non-Keplerian and Unstable- Daniele Mortari