| A | B |
|---|
| accelerate | the rate of changein the velocity (speed) of a moving object when going faster |
| airfoil | a part of an aircraft with a flat or curved surface such as a wing or fin |
| blast deflector plate | a metal plate that slides over the launch rod used to prevent the ignited engine propellant from burning the launcher or the ____________ beneath it |
| center of gravity | the point in a body around when its weight is evenly distributed |
| center of mass | same as center of gravity |
| center of pressure | the point on a model rocket where an air current will no longer cause either end of the rocket to point into the wind |
| clinometer | an instrument used to measure angles of slope or inclination |
| delay charge | the second of three charges in a rocket engine |
| drag | the resisting forces of air acting on a model rocket during its upward flight |
| ejection charge | the third of three charges in a model rocket engine |
| fillet | on model rockets, a glue filler applied to the launching joint or a fin joint strengthening the bond between the fin or launch log and the rocket body |
| fin | a part of a model rocket whose chie function is to provide stability in flight |
| gravity | force that tends to draw all bodies in the earth's sphere toward the center of the earth |
| igniter | used for direct electrical firing of rockets |
| launch | to send off a self-propelled object |
| launch area | a large open area used as a place to launch model rockets |
| launch log | a section of soda straw mounted parallel to the sides of the body tube that has the odel rocket on the launchers |
| launch rod | a rod used to hold the model rocket on the launches before firing |
| microclips | clips used to attach the power system to the igniter |
| model rocket engine | the solid propellant power system o a model rocket designated to perform all power functions during launch |
