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J

JANAF

U.S. military term referring to Joint Army-Navy-Air Force.

JATO (Jet Assisted Take-Off)

A rocket motor used to assist the take-off of an aircraft.

Jell

Something gelatinized (like "jello"), but spell "jellied gasoline" (gasoline thickened with "Napalm.")

Jet

The central stream of high velocity particles or gases from a shaped charge.

Jolt And Jumble Tests

Tests intended to simulate the shocks various components of ammunition are subjected to in transportation and handling.

Joule

Symbol J.

1 Joule = 1 Newton-meter = 0.738 ft• lb.

Jump

The movement which the tube of the gun describes under the shock of firing, but before the projectile leaves the muzzle. Usually expressed as an angle.

 

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