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Along with the Alouette III, the Cheetah was a key product for HAL; experience from manufacturing the type aided in the later development of more advanced indigenous helicopters such as the HAL Dhruv. [5] During the 1990s, HAL developed an armed light attack helicopter based upon the Cheetah, which was given the name Lancer. [6] [7]
[1] [2] Unlike fixed-wing aircraft, of which the stall occurs at relatively low flight speed, the dynamic stall on a helicopter rotor emerges at high airspeeds or/and during manoeuvres with high load factors of helicopters, when the angle of attack(AOA) of blade elements varies intensively due to time-dependent blade flapping, cyclic pitch and ...
RealFlight RC Simulator is a radio-controlled airplane and helicopter simulation software series developed by Knife Edge Software and now published by Horizon Hobby. The software allows for the flying of numerous RC aircraft, helicopters and drones so that the user can learn to fly RC, practice their skills or fly with others in multiplayer mode.
The Utah 3D Animation Repository, a small collection of animated 3D models; scene collection, by Physically Based Rendering Toolkit: a number of interesting scenes to render with global illumination; MGF Example Scenes, a small collection of some indoor 3D scenes; archive3D, a collection of 3D models; 3DModels, a collection of vehicle 3D models
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The FAA states "The height–velocity diagram or H/V curve is a graph charting the safe/unsafe flight profiles relevant to a specific helicopter. As operation outside the safe area of the chart can be fatal in the event of a power or transmission failure it is sometimes referred to as the dead man's curve."
Bell Helicopters already had extensive experience with VTOL aircraft and was able to utilize an already developed test mockup. In 1964 the prototype, internally referred to by Bell as Model D2127, was ordered by the Navy and received the X-22 designation. It was unveiled at an event in Niagara Falls in May 1965. [1] [2]
A reference model—in systems, enterprise, and software engineering—is an abstract framework or domain-specific ontology consisting of an interlinked set of clearly defined concepts produced by an expert or body of experts to encourage clear communication. A reference model can represent the component parts of any consistent idea, from ...