|
Oxford Gliding Club
Oxford Gliding Club (OGC) is a UK gliding club, and is one of the oldest still in operation in the UK. Currently it operates from RAF Weston-on-the-Green, north of Oxford. In 2012, the club celebrated its 75th anniversary. History Formation The pre-war ancestor to the club was the "Oxford University and City Gliding Club" which had its inaugural meeting at Christchurch College on Thursday 2 December 1937. The founders were predominantly Oxford academics, including author and anthropologist Robert Sutherland Rattray, Professor H H Price, philosopher Professor Gilbert Ryle and physicist Professor Frederick Lindemann, 1st Viscount Cherwell (later Lord Cherwell). They were helped in their search for a suitable site by aviator Amy Johnson. Frederick Lindemann went on to become scientific advisor to Winston Churchill and was paymaster general during World War II. Historical Operations Flying began on Saturday, 7 May 1938, at a site known as Cumnor meadow, which is now on the bed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gliding
Gliding is a recreational activity and competitive air sport in which pilots fly unpowered aircraft known as gliders or sailplanes using naturally occurring currents of rising air in the atmosphere to remain airborne. The word ''soaring'' is also used for the sport. Gliding as a sport began in the 1920s. Initially the objective was to increase the duration of flights but soon pilots attempted cross-country flights away from the place of launch. Improvements in aerodynamics and in the understanding of weather phenomena have allowed greater distances at higher average speeds. Long distances are now flown using any of the main sources of rising air: ridge lift, thermals and lee waves. When conditions are favourable, experienced pilots can now fly hundreds of kilometres before returning to their home airfields; occasionally flights of more than are achieved. Some competitive pilots fly in races around pre-defined courses. These gliding competitions test pilots' abilities to mak ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RAF Bicester
Bicester Aerodrome, formerly RAF Bicester, is an airfield on the outskirts of the English town of Bicester in Oxfordshire. Dating back to 1916, this military airfield is notable as the location of the first flight of the prototype Handley Page Halifax in 1939 and was later the home of No. 71 Maintenance Unit, RAF (Royal Air Force); the RAF finally left in 2004. The airfield consists of of well-drained short-mown grass, with two nominal runways (not marked) of 06/24 () and 16/34 () long. The airfield surface is bumpy in places, due to collapsing field drains, requiring care on the part of pilots operating aircraft in those areas. History In 1911, flying first took place on the site, when Lt H.R.P Reynolds landed a Bristol Boxkite biplane on the field. Organised flying began in 1916 when a Training Depot was established. In January 1917, the Royal Flying Corps (RFC) moved into the site, then , with the arrival of 118 night bomber squadron. Canvas-covered Bessonneau hangars were ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aerobatics
Aerobatics is the practice of flying maneuvers involving aircraft attitudes that are not used in conventional passenger-carrying flights. The term is a portmanteau of "aerial" and "acrobatics". Aerobatics are performed in aeroplanes and gliders for training, recreation, entertainment, and sport. Additionally, some helicopters, such as the MBB Bo 105, are capable of limited aerobatic manoeuvres. An example of a fully aerobatic helicopter, capable of performing loops and rolls, is the Westland Lynx. Most aerobatic manoeuvres involve rotation of the aircraft about its longitudinal (roll) axis or lateral (pitch) axis. Other maneuvers, such as a spin, displace the aircraft about its vertical (yaw) axis. Manoeuvres are often combined to form a complete aerobatic sequence for entertainment or competition. Aerobatic flying requires a broader set of piloting skills and exposes the aircraft to greater structural stress than for normal flight. In some countries, the pilot must wear a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cross-country Flying
Cross-country flying ( XC flying) is a type of distance flying which is performed in a powered aircraft on legs over a given distance and in operations between two points using navigational techniques; and an unpowered aircraft (paraglider, hang glider or sailplane) by using upcurrents to gain altitude for extended flying time. Cross country is distinct from purely aerial work in a small defined area requiring little navigation. Official definitions by country Canada Transport Canada does not provide a definition of "cross-country" flight in the Canadian Aviation Regulations (CARs), however, a general consensus among pilots is that, in order to log "cross-country time" in a Pilot's Logbook, the pilot must have demonstrated some kind of navigational ability during the logged period of time. This is substantiated by references to: *the requirement to file a flight plan beyond 25 nautical miles of the departure aerodrome for "cross-country flights," *the requirement to carry an Em ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glaser-Dirks DG-500
The Glaser-Dirks DG-500, and later the DG-505, is a two-seat glider of glass-reinforced plastic and carbon fiber reinforced plastic construction, manufactured in the DG Flugzeugbau GmbH in Bruchsal, Germany. It first flew in 1987. Design The glider is a trainer with an 18-metre wingspan or a high-performance glider with 20 or 22 m span. There are also trailing edge flaps with the exception of the Trainer and Orion variants. The 20m version also has winglets. The fuselage has a single wheel main landing gear which retracts into the lower fuselage. The DG-500/18 is mainly intended for flight training, and is fully aerobatic with +7/-5 g rating. There is also a motorglider version, the DG-500M. The DG-500/22 can carry up to 160 kg of water ballast which is not possible on the trainer version. Since 2004, the latest version of the DG-500 has been built as the "DG-505 Orion" in Slovenia. Past altitude record The DG-500 once held the all-time altitude record for manned glide ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Schleicher ASK 13
The ASK 13 is a two-seater glider that was built by German sailplane manufacturer Alexander Schleicher Gmbh & Co. It was and still is widely used for basic training of glider pilots. Design and development In 1965 Rudolf Kaiser continued development of the two-seat Ka 2 and Schleicher Ka 7 by introducing the ASK 13, using a mixture of materials including metal, wood and glassfibre. It has swept-forward single-spar wings, positioned lower than in the Ka 7, which allows for a large blown canopy providing a good all-round view for both pilots. The 6 degree forward sweep of the wing allows the rear pilot to be seated near the centres of gravity and lift. The glider therefore maintains the same trim whether flown single seated or dual seated. The D-type leading edge torsion box is of plywood and the whole wing is fabric-covered. There are metal Schempp-Hirth air brakes above and below the wing, and the wooden ailerons are fabric-covered. The fuselage is a welded steel tube str ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spin (aerodynamics)
In flight dynamics a spin is a special category of stall resulting in autorotation (uncommanded roll) about the aircraft's longitudinal axis and a shallow, rotating, downward path approximately centred on a vertical axis. Spins can be entered intentionally or unintentionally, from any flight attitude if the aircraft has sufficient yaw while at the stall point. In a normal spin, the wing on the inside of the turn stalls while the outside wing remains flying. It is possible for both wings to stall, but the angle of attack of each wing, and consequently its lift and drag, are different. Either situation causes the aircraft to autorotate toward the stalled wing due to its higher drag and loss of lift. Spins are characterized by high angle of attack, an airspeed below the stall on at least one wing and a shallow descent. Recovery and avoiding a crash may require a specific and counter-intuitive set of actions. A spin differs from a spiral dive, in which neither wing is stalled an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Schleicher ASK 21
The ASK 21 is a glass-reinforced plastic (GRP) two-seat glider aircraft with a T-tail. The ASK 21 is designed primarily for beginner instruction, but is also suitable for cross-country flying and aerobatic instruction. Design and development The ASK 21 was designed by Rudolf Kaiser to replace the popular ASK 13, providing a modern two-seat aircraft bridging the gap between initial training and single-seat performance flying. The ASK 21 is the first full-GRP two-seater produced by Schleicher, flying for the first time in February 1979 (6.2.1979). Production also began in 1979, remaining in production to this day (May 2018), over 900 units completed. In December 2004 the ASK 21 Mi, a self-launching version, made its first flight. In 2003 the operating time was extended to 18,000 hours A revised and improved version, the ASK 21B was introduced in 2018. Construction The two seats are in a tandem arrangement with dual controls, adjustable rudder pedals and seatbacks. The fuselage c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dyneema
Ultra-high-molecular-weight polyethylene (UHMWPE, UHMW) is a subset of the thermoplastic polyethylene. Also known as high-modulus polyethylene, (HMPE), it has extremely long chains, with a molecular mass usually between 3.5 and 7.5 million amu. The longer chain serves to transfer load more effectively to the polymer backbone by strengthening intermolecular interactions. This results in a very tough material, with the highest impact strength of any thermoplastic presently made. UHMWPE is odorless, tasteless, and nontoxic. It embodies all the characteristics of high-density polyethylene (HDPE) with the added traits of being resistant to concentrated acids and alkalis, as well as numerous organic solvents. It is highly resistant to corrosive chemicals except oxidizing acids; has extremely low moisture absorption and a very low coefficient of friction; is self-lubricating (see boundary lubrication); and is highly resistant to abrasion, in some forms being 15 times more resistant t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Liquefied Petroleum Gas
Liquefied petroleum gas (LPG or LP gas) is a fuel gas which contains a flammable mixture of hydrocarbon gases, specifically propane, propylene, butylene, isobutane and n-butane. LPG is used as a fuel gas in heating appliances, cooking equipment, and vehicles. It is increasingly used as an aerosol propellant and a refrigerant, replacing chlorofluorocarbons in an effort to reduce damage to the ozone layer. When specifically used as a vehicle fuel, it is often referred to as autogas or even just as gas. Varieties of LPG that are bought and sold include mixes that are mostly propane (), mostly butane (), and, most commonly, mixes including both propane and butane. In the northern hemisphere winter, the mixes contain more propane, while in summer, they contain more butane. In the United States, mainly two grades of LPG are sold: commercial propane and HD-5. These specifications are published by the Gas Processors Association (GPA) and the American Society of Testing and Ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
General Aviation
General aviation (GA) is defined by the International Civil Aviation Organization (ICAO) as all civil aviation aircraft operations with the exception of commercial air transport or aerial work, which is defined as specialized aviation services for other purposes. However, for statistical purposes ICAO uses a definition of general aviation which includes aerial work. General aviation thus represents the "private transport" and recreational components of aviation. Definition The International Civil Aviation Organization (ICAO) defines civil aviation aircraft operations in three categories: General Aviation (GA), Aerial Work (AW) and Commercial Air Transport (CAT). Aerial work operations are separated from general aviation by ICAO by this definition. Aerial work is when an aircraft is used for specialized services such as agriculture, construction, photography, surveying, observation and patrol, search and rescue, and aerial advertisement. However, for statistical purposes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bank Holiday
A bank holiday is a national public holiday in the United Kingdom, Republic of Ireland and the Crown Dependencies. The term refers to all public holidays in the United Kingdom, be they set out in statute, declared by royal proclamation or held by convention under common law. The term "bank holiday" refers to the fact that banking institutions typically close for business on such holidays, as they once used to do on certain Saint's days. List of current holidays Notes See also * List of holidays by country * Bank Holidays Act 1871 * Proposed St David's Day bank holiday Saint David's Day is currently not a bank holiday in Wales. Some Welsh politicians have proposed that St David's Day, a celebration of Welsh identity, observed on 1 March, be designated as a public holiday. Polls show the proposal to have majori ... References External links UK bank holidaysScotland Bank Holidays - Scottish Government* {{DEFAULTSORT:Bank Holiday British culture Irish cul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> General Aviation")