Technology / Rockets Glossary

Thrust: Force produced by a rocket motor by the efflux of matter at high velocity.

Total Impulse: The total impulse of a rocket motor is the measure of its power which is measured in Newton seconds. In model & high power rocketry, the total impulse of a motor is indicated by a letter. Th . . . View Full Definition

Transducer: Outputs electrical signal proportional to a force or pressure input.

Ullage: Unfilled volume of a propellant tank and rarely the unfilled volume in a solid motor.

Unrestricted: Refers to a free-standing grain which burns on all surfaces. This method leaves the chamber wall unprotected by propellant and is therefore seldom used.

Wall Thickness: Is equal to 1/2 the difference between the inside diameter and outside diameter of a chamber or tank. The actual gauge of the material used to make the vessel.

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