Model Rocketry and Siege Engine Glossary Letter W


Model Rocketry and Siege Engine Glossary Letter W

Glossary
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Wadding
A non-flammable filler material placed in a model rocket airframe before the parachute is inserted that acts as a piston for deployment charge gases and protects the parachute and other deployment system components from burning
Waiver
A permission granted by the FAA or other government body to launch large rockets into airspace that it controls, for specific altitudes (usually 5000 or 10,000 feet) and for a specific period of time.
Warhead
That part of a missile that constitutes the explosive, chemical, or other charge intended to damage the enemy or target
Warp
A twist, usually undesired, in a normally flat object such as a fin
Weather cocking
The tendency of a rocket to fly into a breeze, altering the flight path from vertical
Wedging
A method of securing fins by forcing the fin root in between tubes in a motor cluster
Weightlessness
A property or attribute of being without weight
Wind Tunnel
A specially designed pipe in which moving air can be channeled in a controlled way, producing an air stream of laminar flow and constant velocity, thus allowing testing of a design under constant conditions
Wing
In British usage, a rocket’s fins. Also, the lifting surfaces of a glider or plane
Wing Loading
A method for measuring appropriate wing size, calculated by dividing the wing area in inches squared by the mass of the aircraft
Winglets
Small fin or wing-like extensions attached to the ends of the wings of an aircraft
Wood Grain
The predominant direction of the fibers in a piece of wood. Important to note as the strength of the material is perpendicular to the fiber direction


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