Search results
Results from the WOW.Com Content Network
Spin testing is a potentially hazardous exercise, and the test aircraft must be equipped with some spin-recovery device such as a tail parachute, jettisonable ballast, or some method of rapidly moving the center of gravity forward. Agricultural airplanes are typically certificated in the normal category at a moderate weight.
Clancy, L.J. (1975), Aerodynamics, Pitman Publishing Limited, London.ISBN 0-273-01120-0 "Autorotation and spin entry". Archived from the original on 2 March 2009; Stinton, Darryl (1996), Flying Qualities and Flight Testing of The Aeroplane, Blackwell Science Ltd, Oxford UK.
A spin can occur if an aircraft is stalled and there is an asymmetric yawing moment applied to it. [17] This yawing moment can be aerodynamic (sideslip angle, rudder, adverse yaw from the ailerons), thrust related (p-factor, one engine inoperative on a multi-engine non-centreline thrust aircraft), or from less likely sources such as severe ...
A spiral dive is not a spin; it starts, not with a stall or from torque, but with a random perturbation, increasing roll and airspeed. Without prompt intervention by the pilot this can lead to structural failure of the airframe, either as a result of excess aerodynamic loading or flight into terrain. The aircraft initially gives little ...
This ballistic trajectory is referred to as the bullet path. If the projectile is spin stabilized, aerodynamic forces will also predictably arc the trajectory slightly to the right, if the rifling employs "right-hand twist." Some barrels are cut with left-hand twist, and the bullet will arc to the left, as a result.
The three axes of rotation in an aircraft. Flight dynamics is the science of air vehicle orientation and control in three dimensions. The three critical flight dynamics parameters are the angles of rotation in three dimensions about the vehicle's center of gravity (cg), known as pitch, roll and yaw.
For a tailless aircraft, the neutral point coincides with the aerodynamic center, and so for such aircraft to have longitudinal static stability, the center of gravity must lie ahead of the aerodynamic center. [13] For missiles with symmetric airfoils, the neutral point and the center of pressure are coincident and the term neutral point is not ...
A spin is more complex, involving intentionally stalling a single wing, causing the plane to descend spiraling around its yaw axis in a corkscrew motion. A hammerhead (also known as a stall turn ) is performed by pulling the aircraft up until it is pointing straight up (much like the beginning of a loop), but the pilot continues to fly straight ...