Autorotation is a state of flight in which the main rotor system of a helicopter or other rotary-wing aircraft turns by the action of air moving up through...

For fixed-wing aircraft, autorotation is the tendency of an aircraft in or near a stall to roll spontaneously to the right or left, leading to a spin (a...

gyroplane, is a class of rotorcraft that uses an unpowered rotor in free autorotation to develop lift. A gyroplane "means a rotorcraft whose rotors are not...

uses an unpowered rotor, driven by aerodynamic forces in a state of autorotation to develop lift, and an engine-powered propeller, similar to that of...

because it may be impossible for the pilot to complete an emergency autorotation from a starting point within these regions. The H/V curve also contains...

axis traverse to the wind so that Magnus-effect lift obtains during autorotation; the electricity is generated with end-hub generators. The LTA Windpower...

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...

on a routine training flight. While making his second attempt at an autorotation with powered recovery, the aircraft was unable to recover power after...

the R22 to enter autorotation and land in a controlled manner. Because the main rotor has very little mass and inertia, autorotation in an R22 requires...

from the engine so that the rotors can continue spinning and perform autorotation. Helicopter clutches are usually freewheel clutches relying on centrifugal...

basic flight conditions for a helicopter: hover, forward flight and autorotation. Some pilots consider hovering the most challenging aspect of helicopter...

the pilot shut off the engine and initiated a power-off descent under autorotation from approximately 950 feet (290 m) above ground level; however, as the...

rotor Unpowered free flight (Free) balloon Glider Helicopter, etc. in autorotation (None – see note 2) Tethered (static or towed) Tethered balloon Kite...

continue rotating faster than the engine so that the helicopter can enter autorotation. A sprag clutch is used in the electric starter motors of modern motorcycle...

successfully utilize cyclic pitch, as well as pioneering the use of autorotation for the safe landing of a damaged helicopter. Pescara also set a world...

evaluated its cost per flight hour at $23,941. While technically capable of autorotation if both engines fail in helicopter mode, a safe landing is difficult...

passing through the body's own center of mass is known as a spin (or autorotation). In that case, the surface intersection of the internal spin axis can...

rotor Unpowered free flight (Free) balloon Glider Helicopter, etc. in autorotation (None – see note 2) Tethered (static or towed) Tethered balloon Kite...

flight, which led to an inadvertent record being set for the longest ever autorotation after which the rotorcraft was brought to a safe unpowered landing. Days...

referred to as "gyrodyne", between a rotaplane (with the rotor free for autorotation and an upward total axial flow through the rotor disc), on the one hand...

rotor Unpowered free flight (Free) balloon Glider Helicopter, etc. in autorotation (None – see note 2) Tethered (static or towed) Tethered balloon Kite...

damage or failure when the rotor(s) are still intact and free to turn. Autorotation, in which airflow over the rotors keeps them turning and provides some...

rotor Unpowered free flight (Free) balloon Glider Helicopter, etc. in autorotation (None – see note 2) Tethered (static or towed) Tethered balloon Kite...

dangerous tendency to go into a spin. Early production C.200 aircraft showed autorotation problems similar to those found in the Fiat G.50 Freccia, IMAM Ro.51...

rotor Unpowered free flight (Free) balloon Glider Helicopter, etc. in autorotation (None – see note 2) Tethered (static or towed) Tethered balloon Kite...

Bristow Helicopters Flight 56C, forcing the crew to perform an emergency autorotation to a ditching in the sea. Despite the rough sea conditions, the 16 oil...

hence permitting it to store energy, which makes performing a successful autorotation landing somewhat easier. However, the tip jet also typically generates...

rotor Unpowered free flight (Free) balloon Glider Helicopter, etc. in autorotation (None – see note 2) Tethered (static or towed) Tethered balloon Kite...

result in substantial damage. With helicopters, a forced landing involves autorotation, since the helicopter glides by allowing its rotor to spin freely during...

motion in special relativity and general relativity Spin (aerodynamics), autorotation of an aerodynamically stalled aeroplane SPIN bibliographic database,...