flat spin

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Related to flat spins: barrel rolls

flat spin

an aircraft spin in which the longitudinal axis is more nearly horizontal than vertical

flat spin

[¦flat ′spin]
(mechanics)
Motion of a projectile with a slow spin and a very large angle of yaw, happening most frequently in fin-stabilized projectiles with some spin-producing moment, when the period of revolution of the projectile coincides with the period of its oscillation; sometimes observed in bombs and in unstable spinning projectiles.

flat spin

flat spin
A spin in which the aircraft longitudinal axis remains at less than 45° below the horizontal. A flat spin is a stabilized spin. The farther back the center of gravity and the more the masses that are distributed along the length of the fuselage, the flatter and faster the spin tends to become and the more difficult it is to recover. This is because it is difficult to reduce the angle of attack to unstall the aircraft even with full application of the elevator control.
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References in periodicals archive ?
Flat spins can be bad because in some cases of wing and fuselage loading and distribution of mass, recovery is impossible through normal means.
Finally, we'll take a look at what makes a flat spin.
For example, if you're in a perfectly flat spin to the right and you apply down elevator, the result will be a roll to the right.
The system, which is designed for 120-knot (maximum) deployments, was successfully test-deployed in spins and flat spins as well as from inverted attitudes.