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Piasecki PA-97 Helistat
The Piasecki PA-97 Helistat was an American experimental heavy-lift aircraft, built by Piasecki by fastening four H-34J helicopters to a framework beneath a helium-inflated blimp envelope. The sole prototype was lost during a test flight, killing a test pilot and injuring another four in the course of a single incident. Design and development Helistat design concept The Helistat concept was to augment the helicopters' dynamic lift with the static lift of an air buoyancy envelope. This would give greater maximum lift capability for heavy-lift work. At low weights (i.e. traveling to site without a payload) it would also free up the helicopters' rotor thrust for forward thrust, requiring less dynamic lift and lower fuel burn. To maintain coincidence of the dynamic and static lifts (otherwise the envelope would pitch as helicopter power increased), it is impractical to use a single helicopter rotor, so multiple rotors are arranged around the center of buoyancy of the envelope. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Piasecki Aircraft
The Piasecki Aircraft Corporation (PiAC) is a manufacturer of aircraft, principally advanced rotorcraft. It was founded by American vertical flight pioneer Frank Piasecki to develop compound helicopters and other advanced rotorcraft after he was ousted from the leadership of his first company, Piasecki Helicopter.Trimble 1982, pp. 257–258. History The company's origins dated back to 1936 with the formation of the P-V Engineering Forum in 1940 and it was renamed the Piasecki Helicopter Corporation in 1946. After a falling out with other owners, Frank Piasecki and some of his design team left to form Piasecki Aircraft Corporation in 1955. The Piasecki Aircraft Corporation is based in Essington, Pennsylvania and is run by Frank Piasecki's sons; Frederick Weyerhaeuser Piasecki is chairman and John Weyerhaeuser Piasecki is president and CEO. In 2005, the company was selected by the United States Army as the prime contractor for two Future Combat Systems (FCS) unmanned aerial vehic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AeroLift CycloCrane
The AeroLift CycloCrane was a unique US hybrid airship which adopted helicopter derived airfoil control for low speed flight manoeuvring by spinning on its axis. It was intended to be a heavy load lifter, initially aimed at the Canadian logging industry. A proof of concept vehicle flew at times during the 1980s, but no large production aircraft were built. Design and development AeroLift Inc was set up in 1980 by CycloCrane inventor Arthur Crimmins, with funding from five major Canadian logging companies, with the objective of building a hybrid airship capable of conducting aerial logging at remote sites inaccessible by conventional means. The CycloCrane was a most unusual aircraft, utterly unique in its method of three-dimensional drive and attitude control. Two proof of concept versions were built, identical in size and varying in some details. Each had a fabric, oblate spheroid gas bag, or aerostat, to provide aerostatic lift sufficient to support the aircraft and fift ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cancelled Military Aircraft Projects Of The United States
Cancel or cancellation may refer to: *Flight cancellation and delay, not operating a scheduled flight Sociology * Cancel culture, boycott and ostracism calling out offensive behavior on social media or in real life Technology and science *Cancel leaf, a bibliographic term for replaced leaves in printed books *Cancellation property, the mathematical property if ''a''×''b'' = ''a''×''c'' then ''b'' = ''c'' **Cancelling out, a technique for simplifying mathematical expressions * Catastrophic cancellation, numerical error arising from subtracting approximations to nearby numbers *Noise cancellation, a method for reducing unwanted sound *Phase cancellation, the effect of two waves that are out of phase with each other being summed *Cancel message, a special message used to remove Usenet articles posted to news servers * Cancel character, an indication that transmitted data are in error or are to be disregarded * Resolution rule, in propositional logic a valid inference rule ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Piasecki Aircraft
The Piasecki Aircraft Corporation (PiAC) is a manufacturer of aircraft, principally advanced rotorcraft. It was founded by American vertical flight pioneer Frank Piasecki to develop compound helicopters and other advanced rotorcraft after he was ousted from the leadership of his first company, Piasecki Helicopter.Trimble 1982, pp. 257–258. History The company's origins dated back to 1936 with the formation of the P-V Engineering Forum in 1940 and it was renamed the Piasecki Helicopter Corporation in 1946. After a falling out with other owners, Frank Piasecki and some of his design team left to form Piasecki Aircraft Corporation in 1955. The Piasecki Aircraft Corporation is based in Essington, Pennsylvania and is run by Frank Piasecki's sons; Frederick Weyerhaeuser Piasecki is chairman and John Weyerhaeuser Piasecki is president and CEO. In 2005, the company was selected by the United States Army as the prime contractor for two Future Combat Systems (FCS) unmanned aerial vehic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Airships Of The United States
An airship or dirigible balloon is a type of aerostat or lighter-than-air aircraft that can navigate through the air under its own power. Aerostats gain their lift from a lifting gas that is less dense than the surrounding air. In early dirigibles, the lifting gas used was hydrogen, due to its high lifting capacity and ready availability. Helium gas has almost the same lifting capacity and is not flammable, unlike hydrogen, but is rare and relatively expensive. Significant amounts were first discovered in the United States and for a while helium was only available for airships in that country. Most airships built since the 1960s have used helium, though some have used hot air.A few airships after World War II used hydrogen. The first British airship to use helium was the ''Chitty Bang Bang'' of 1967. The envelope of an airship may form the gasbag, or it may contain a number of gas-filled cells. An airship also has engines, crew, and optionally also payload accommodation, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1980s United States Experimental Aircraft
__NOTOC__ Year 198 (CXCVIII) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Sergius and Gallus (or, less frequently, year 951 ''Ab urbe condita''). The denomination 198 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Roman Empire *January 28 **Publius Septimius Geta, son of Septimius Severus, receives the title of Caesar. **Caracalla, son of Septimius Severus, is given the title of Augustus. China *Winter – Battle of Xiapi: The allied armies led by Cao Cao and Liu Bei defeat Lü Bu; afterward Cao Cao has him executed. By topic Religion * Marcus I succeeds Olympianus as Patriarch of Constantinople (until 211). Births * Lu Kai (or Jingfeng), Chinese official and general (d. 269) * Quan Cong, Chinese general and advisor (d. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Forest History Society
The Forest History Society is an American non-profit organization dedicated to the preservation of forest and conservation history."Forest History Society." Echo Project. Center for History and New Media, George Mason University. http://echo.gmu.edu/node/144 The society was established in 1946 and incorporated in 1955. The Forest History Society headquarters in Durham, North Carolina, include the Alvin J. Huss Archives and the Carl A. Weyerhaeuser Library, which combine to provide a comprehensive compilation of materials related to the topic of forest history. The archives house large collections from several national organizations and companies such as the Society of American Foresters, the American Forest and Paper Association, the American Forestry Association, the American Tree Farm System, and the Weyerhaeuser Company as well as many other smaller collections of national and international significance. Additionally, the Forest History Society maintains a publication progr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Airship Accidents ...
The following is a partial list of airship accidents. It should be stated that rigid airships operate differently than blimps which have no rigid structure. See also * List of ballooning accidents References {{DEFAULTSORT:List of Airship Accidents *Airships Airship Accidents Airships An airship or dirigible balloon is a type of aerostat or lighter-than-air aircraft that can navigate through the air Powered aircraft, under its own power. Aerostats gain their lift from a lifting gas that is less dense than the surrounding a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cargolifter
Cargolifter AG was a German company founded in 1996 to offer logistical services through point-to point transport of heavy and outsized loads. This service was based on the development of a heavy lift airship, the CL160, a vessel designed to carry a payload. The airship was never built and the company went bankrupt in July 2002. Today, shareholder-founded ''CL CargoLifter GmbH & Co. KG'' company seeks to continue selling the lighter-than-air technology. CargoLifter and Russia’s Aerosmena are among those developing huge airships that can lift up to 600 tons of freight while hovering above the ground or sea. Cargolifter AG was founded by a group of influential engineers and scientists in 1996, and its main goal was to promote airships and develop technologies for their use as a lifting mechanism for transporting heavy and bulky goods to hard-to-reach places. According to this idea, 1 m3 of helium is able to lift 1 kg of cargo, which means that when giving a large cylinder ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SkyHook JHL-40
The SkyHook JHL-40 was a proposed hybrid airship/helicopter. On July 9, 2008, Boeing announced that it had teamed up with SkyHook International, a Canadian company, to develop this aircraft. No further press releases appear after 2009 and Skyhook International has abandoned its domain name registration since 2010 as shown by the Internet Archive. According to company spokespeople, the aircraft would combine the best features of a blimp and a helicopter, and would be capable of carrying a 40 ton load up to without refueling. At long, it would classify as the largest helicopter in the world, and would be capable of flying up to without a load. The craft would use helium to provide enough lift to carry its own weight, and would use four helicopter rotors to lift the load and to propel the aircraft. By using both helium and helicopter rotors, the aircraft can avoid having to jettison helium after unloading. In comparison, the CH-47 Chinook helicopter can carry a load the same dis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
EosXi
The Nimbus EosXi is an Italian unmanned aerial vehicle (UAV) designed for civilian use, developed and manufactured by NIMBUS Srl. EOS XI is a hybrid airship having a large, gas-filled delta wing which provides both aerostatic and aerodynamic lift, referred to by the manufacturer as a "metaplane". The cabin, tail assembly and propulsion system are suspended below the wing. Description Although classified as an aerodyne (an aircraft heavier than air), the additional aerostatic lift allows extremely short take-off and landing (STOL) distances. Unlike conventional aircraft, which use adjustable control surfaces known as ailerons to maneuver in flight, the EosXi wing is a stiff structure with no moving parts. The craft uses only the suspended tail assembly's moveable planes for course and attitude control, relying on the wing's aerostatic lift to enhance stability. The large wing has a low wing loading that contributes to the vehicle's STOL characteristics. The wing envelope has a mu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
