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V-Prop
The V-Prop is an automatic self-powering electronic variable-pitch propeller developed by Silence Aircraft, the manufacturers of the Silence Twister single-seat elliptical-winged kitplane. Design and development The V-Prop was fitted to the prototype Twister and to some of the Twisters built in the EU. Designed by brothers Thomas and Mattheus Strieker, this microprocessor-controlled automatic propeller has a vaned spinner ahead of the main spinner. The main spinner is fixed to the output shaft in the normal fashion; but the vaned spinner is free to contra-rotate, and in doing so both generates its own power and derives rpm data that it uses to determine the ideal blade angle. The unit then automatically adjusts the blades between the coarse and fine positions. On the ground, the electronic control system can be tailored to suit each aircraft by varying some soldered connections, which give some 16 options.Silence Aircraft, (2005) ''Manual for the Silent R 1,61m V 3 and V2, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
V-Prop Automatic Variable-pitch Propeller
The V-Prop is an automatic self-powering electronic variable-pitch propeller developed by Silence Aircraft, the manufacturers of the Silence Twister single-seat elliptical-winged kitplane. Design and development The V-Prop was fitted to the prototype Twister and to some of the Twisters built in the EU. Designed by brothers Thomas and Mattheus Strieker, this microprocessor-controlled automatic propeller has a vaned spinner ahead of the main spinner. The main spinner is fixed to the output shaft in the normal fashion; but the vaned spinner is free to contra-rotate, and in doing so both generates its own power and derives rpm data that it uses to determine the ideal blade angle. The unit then automatically adjusts the blades between the coarse and fine positions. On the ground, the electronic control system can be tailored to suit each aircraft by varying some soldered connections, which give some 16 options.Silence Aircraft, (2005) ''Manual for the Silent R 1,61m V 3 and V2, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silence Twister
The Silence Twister is a German ultralight designed by Silence Aircraft for amateur construction, either from plans or kits. The prototype first flew on 30 September 2000. Design and development The Twister is a single-seat low-wing monoplane with elliptical wings and tailplane. It has a retractable conventional landing gear with a fixed tailwheel. The design drew inspiration from the Supermarine Spitfire, and the shapes of the Twister's wings, fin and tailplane all recall the famous World War II fighter. Designed to take engines up to , the prototype was fitted with a single-rotor MidWest Wankel engine. This compact rotary motor allowed a sleek engine cowling, but the engine was rejected and production aircraft use Jabiru 2200 or ULPower UL260i engines. An electric aircraft version was under development in 2010. Propeller The Twister prototype was fitted with Silence Aircraft's own automatic variable-pitch propeller called the " VProp". The LAA have yet to allow the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hoffmann Propeller
Hoffman Propeller is a German manufacturer of aircraft propellers. The company headquarters is located at Rosenheim in Bavaria, Germany.Purdy, Don: ''AeroCrafter - Homebuilt Aircraft Sourcebook'', page 84. BAI Communications. The company makes design, manufacture and maintain propellers with blades in wooden composite construction for needed purposes, mainly for the general aviation, hovercraft and any special applications such as blades for wind tunnels the automotive industries. By the version of Aircraft Turboprop Propeller System Market Outlook, the company was one of the major market players. History Established in 1955 the company initially designed and produced propellers for motor gliders with a staff of six. The company expanded into the field of general aviation propeller overhaul and today, with a staff of 57, the company offers a wide range of propeller services including new certified replacements for vintage aircraft where the original propeller type is unavailab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kit Planes
Homebuilt aircraft, also known as amateur-built aircraft or kit planes, are constructed by persons for whom this is not a professional activity. These aircraft may be constructed from "scratch", from plans, or from assembly kits.Armstrong, Kenneth: ''Choosing Your Homebuilt - the one you will finish and fly! Second Edition'', pp. 39–52. Butterfield Press, 1993. Peter M Bowers: ''Guide to Homebuilts - Ninth Edition''. TAB Books, Blue Ridge Summit PA, 1984. Overview In the United States, Brazil, Australia, New Zealand and South Africa, homebuilt aircraft may be licensed Experimental under FAA or similar local regulations. With some limitations, the builder(s) of the aircraft must have done it for their own education and recreation rather than for profit. In the U.S., the primary builder can also apply for a repairman's certificate for that airframe. The repairman's certificate allows the holder to perform and sign off on most of the maintenance, repairs, and inspections themsel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
G-force
The gravitational force equivalent, or, more commonly, g-force, is a measurement of the type of force per unit mass – typically acceleration – that causes a perception of weight, with a g-force of 1 g (not gram in mass measurement) equal to the conventional value of gravitational acceleration on Earth, ''g'', of about . Since g-forces indirectly produce weight, any g-force can be described as a "weight per unit mass" (see the synonym specific weight). When the g-force is produced by the surface of one object being pushed by the surface of another object, the reaction force to this push produces an equal and opposite weight for every unit of each object's mass. The types of forces involved are transmitted through objects by interior mechanical stresses. Gravitational acceleration (except certain electromagnetic force influences) is the cause of an object's acceleration in relation to free fall. The g-force experienced by an object is due to the vector sum of all ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lycoming O-360
The Lycoming O-360 is a family of four-cylinder, direct-drive, horizontally opposed, air-cooled, piston aircraft engines. Engines in the O-360 series produce between 145 and 225 horsepower (109 to 168 kW), with the basic O-360 producing 180 horsepower. The engine family has been installed in thousands of aircraft, including the Cessna 172, Piper Cherokee/Archer, Grumman Tiger, and many home-built types. It has a factory rated time between overhaul (TBO) of 2000 hours or twelve years. O-360 family engines are also widely used in airboats, most notably in the Hurricane Aircats used by the US Army during the Vietnam War. The first O-360 certified was the A1A model, certified on 20 July 1955 to United States CAR 13 effective March 5, 1952 as amended by 13-1 and 13-2. The Lycoming IO-390 is an O-360 which has had its cylinder bore increased by , developing . Series The O-360 family of engines comprises 167 different models with 12 different prefixes. All have a displa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canadian Owners And Pilots Association
The Canadian Owners and Pilots Association (COPA) (french: Association canadienne des pilotes et propriétaires d'aéronefs) is a federally registered not-for-profit association that provides information and advocacy services for Canadian pilots who fly for non-commercial purposes. COPA has close to 15,000 members which ranks it as the largest aviation association of any kind in Canada. Its mission is to "Advance, promote and preserve the Canadian freedom to fly". Its members represent about 50% of all private and commercial pilots in the country. History COPA was formed in 1952 by Ottawa aviators Margaret Carson and John Bogie. They saw the need for an organization to represent the interests of private pilots to the government of Canada. Their model was the US-based Aircraft Owners and Pilots Association (AOPA) which had been formed 13 years earlier in 1939. After meeting with AOPA principals and receiving encouragement from them, COPA was set up with headquarters in Carson ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kit Plane
Homebuilt aircraft, also known as amateur-built aircraft or kit planes, are constructed by persons for whom this is not a professional activity. These aircraft may be constructed from "scratch", from plans, or from assembly kits.Armstrong, Kenneth: ''Choosing Your Homebuilt - the one you will finish and fly! Second Edition'', pp. 39–52. Butterfield Press, 1993. Peter M Bowers: ''Guide to Homebuilts - Ninth Edition''. TAB Books, Blue Ridge Summit PA, 1984. Overview In the United States, Brazil, Australia, New Zealand and South Africa, homebuilt aircraft may be licensed Experimental under FAA or similar local regulations. With some limitations, the builder(s) of the aircraft must have done it for their own education and recreation rather than for profit. In the U.S., the primary builder can also apply for a repairman's certificate for that airframe. The repairman's certificate allows the holder to perform and sign off on most of the maintenance, repairs, and inspections themse ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Certified Aircraft
A type certificate signifies the airworthiness of a particular category of aircraft, according to its manufacturing design (''type design''). It confirms that the aircraft of a new type intended for serial production, is in compliance with applicable airworthiness requirements established by the national air law. For up to three seats, primary category aircraft, certification costs around US$1m, US$25m for a general aviation aircraft and hundreds of millions of dollars for a commercial aircraft; certification delays can cost millions of dollars and can decide a program's profitability. Authority A type certificate (TC) is issued to signify the airworthiness of the approved design or "type" of an aircraft to be manufactured. The TC is issued by a regulatory authority, and once issued, the design cannot be changed unless at least part of the process for certification is repeated to cover the changes. The TC reflects a determination made by a regulatory authority that the type desig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Light Aircraft Association
The Light Aircraft Association (LAA) is the representative body in the United Kingdom for amateur aircraft construction, and recreational and sport flying. It oversees the construction and maintenance of homebuilt aircraft, under an approval from the UK Civil Aviation Authority (CAA). The LAA was formerly known as the Popular Flying Association and was originally founded in 1946 as the Ultralight Aircraft Association. LAA Permit regime The regime for approving amateur-built aircraft in the United Kingdom differs from that in many other countries, of which the United States is the prime example. Instead of the FAA's Experimental airworthiness category, under which an amateur may design, build and operate (and is ultimately responsible for) an aircraft 'for experimental purposes', the UK CAA is required to investigate any such aircraft's 'fitness to fly' and to issue a 'Permit to Fly' when satisfied. The LAA is approved by the CAA to make recommendations for and to revalidate such Pe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Controllable Pitch Propeller
In marine propulsion, a variable-pitch propeller is a type of propeller with blades that can be rotated around their long axis to change the blade pitch. Reversible propellers—those where the pitch can be set to negative values—can also create reverse thrust for braking or going backwards without the need to change the direction of shaft revolution. A controllable pitch propeller (CPP) can be efficient for the full range of rotational speeds and load conditions, since its pitch will be varied to absorb the maximum power that the engine is capable of producing. When fully loaded, a vessel will need more propulsion power than when empty. By varying the propeller blades to the optimal pitch, higher efficiency can be obtained, thus saving fuel. A vessel with a VPP can accelerate faster from a standstill and can decelerate much more effectively, making stopping quicker and safer. A CPP can also improve vessel maneuverability by directing a stronger flow of water onto the ru ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
