Helicopters

Helicopters: Description, Photo, Offline

The free application "Helicopters: Description, Photo, Offline" is very friendly, it has a beautiful and simple interface. The best choice for a pocket dictionary that is always at hand. From which you can learn a lot of new and interesting things, for example, that:

Flap back

Flap back or blowback is a phenomenon affecting the rotor of a helicopter as it overcomes dissymmetry of lift through flapping. In forward flight, rotor blades experience more lift as they rotate forward. This increased lift is a result of an increased relative speed causing the blade to flap up and decrease its angle of attack. As the blade continues to rotate, it achieves its maximum upflapping displacement over the nose of the aircraft and maximum downflapping displacement over the tail. This results in the rotor disk being tilted to the rear and is referred to as flap back, as if the rotor disk had flapped or tilted back, or as if it had been blown back by the relative wind. The effect is more pronounced at higher airspeeds but more easily recognized as the aircraft accelerates to translational lift airspeeds from a hover. Flap back results in a slowing of the aircraft and the pilot counters the effect by applying forward input to the cyclic control.

NOAA-19

NOAA-19, designated NOAA-N' prior to launch, is the last of the United States National Oceanic and Atmospheric Administration's POES series of weather satellites. NOAA-19 was launched on February 6, 2009.

Mil V-16

The Mil V-16 was a Soviet heavy cargo/transport helicopter project of the late 1960s. The Mil V-16 was designed by Mil Design Bureau, a Moscow helicopter plant. The original scheme described a heavy side-by-side twin-rotor aircraft with two Soloviev D-25VF gas turbine engines below six-bladed rotors at the tips of heavily supported wings on each side of the fuselage and tricycle-type landing gear, with both rear landing wheels mounted below the wings while the front wheel was located below the cockpit, as well as located directly under the wings.

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