Search results
Results From The WOW.Com Content Network
Helicopter pilots are provided with performance charts which show the limitations for hovering their helicopter in ground effect (IGE) and out of ground effect (OGE). The charts show the added lift benefit produced by ground effect. [3] For fan and jet-powered vertical take-off and landing (VTOL) aircraft, ground effect when hovering can cause ...
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."
For helicopter movement, the chart shall provide information between the helicopter stand, the touchdown and lift-off area, and the final approach and take-off area; the chart should also supplement information along helicopter ground and air taxiways and air transit routes. In addition, essential operational information should also be provided ...
The tail rotor, mounted on the starboard side of the boom, has its two blades protected from ground strikes by a long, curved tubular bumper. [1] The pod seats two side-by-side behind a full clear forward transparency. Its skin is carbon fibre over a titanium alloy tube frame.
Translational lift is improved rotor efficiency resulting from directional flight in a helicopter.Translation is the conversion from the hover to forward flight. [1]: 2–27 As undisturbed air enters the rotor system horizontally, turbulence and vortices created by hovering flight are left behind and the flow of air becomes more horizontal.
The ground effect occurs when flying at an altitude of only a few metres above the ocean or ground; drag is greatly reduced by the proximity of the ground preventing the formation of wingtip vortices, thus increasing the efficiency of the wing. This effect does not occur at high altitude. [5] [6] The name Lun comes from the Russian word for the ...
The effects of the approximation C L0 = 0 are less than 5%; of course, with a finite C L0 = 0.1, the analytic and graphical methods give the same results. [ 6 ] The low speed region of flight is known as the "back of the power curve" or "behind the power curve" [ 7 ] [ 8 ] (sometimes "back of the drag curve") where more thrust is required to ...
Its comprises helicopter aerodynamics, stability, control, structural dynamics, vibration, and aeroelastic and aeromechanical stability. [1] By studying the forces in helicopter flight, improved helicopter designs can be made, though due to the scale and speed of the dynamics, physical testing is non-trivial and expensive.