Model Rocketry and Siege Engine Glossary Letter V


Model Rocketry and Siege Engine Glossary Letter V

Glossary
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Vacu-form
A method of making lightweight plastic components like nose cones by using heated plastic, a mold, and a vacuum pump that is attached to the mold
Vectored Thrust
A condition in which a rocket motor’s thrust is not parallel to the motor’s axis. This is achieved by canting the motor’s exhaust nozzle, and is often done to reduce the unsymmetrical thrust that results from outboard motors failing to ignite on clustered-motor rockets
Vernier Engine
A rocket engine of small thrust used to obtain a fine adjustment in the velocity and trajectory of a ballistic missile just after the thrust of the final-stage main engines has been cut off
Von Karmon
A nose cone shape. Von Karmon is a special case of the Sears-Haack series of nose cone shapes, used on very high-speed rockets. It is the most efficient volume per unit nose drag


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