@X08The clay nozzle is where the igniter is inserted@X05.@X08 When the area labeled
@X05"@X08thrust@X05"@X08 is ignited@X05,@X08 the @X05"@X08thrust@X05"@X08 material@X05,@X08 usually a large single grain of a
propellant such as black powder or pyrodex@X05,@X08 burns@X05,@X08 forcing large volumes of hot@X05,
@X08rapidly expanding gasses out the narrow nozzle@X05,@X08 pushing the rocket forward@X05.@X08
After the material has been consumed@X05,@X08 the smoke section of the engine is
ignited@X05.@X08 It is usually a slow@X05-@X08burning material@X05,@X08 similar to black powder that
has had various compounds added to it to produce visible smoke@X05,@X08 usually black@X05,@X08
white@X05,@X08 or yellow in color@X05.@X08 This section exists so that the rocket will be seen
when it reaches its maximum altitude@X05,@X08 or apogee@X05.@X08 When it is burned up@X05,@X08 it
ignites the ejection charge@X05,@X08 labeled @X05"@X08eject@X05".@X08 The ejection charge is finely
powdered black powder@X05.@X08 It burns very rapidly@X05,@X08 exploding@X05,@X08 in effect@X05.@X08 The
explosion of the ejection charge pushes out the parachute of the model rocket@X05.
@X08It could also be used to ignite the fuse of a bomb@X05...
@X08 Rocket engines have their own peculiar labeling system@X05.@X08 Typical engine
labels are@X05:@X08 1@X05/@X084A@X05-@X082T@X05, @X081@X05/@X082A@X05-@X083T@X05,@X08 A8@X05-@X083@X05, @X08B6@X05-@X084@X05,@X08 C6@X05-@X087@X05,@X08 and D12@X05-@X085@X05.@X08 The letter is an
indicator of the power of an engine@X05.@X08 @X05"@X08B@X05"@X08 engines are twice as powerful as @X05"@X08A@X05"
@X08engines@X05,@X08 and @X05"@X08C@X05"@X08 engines are twice as powerful as @X05"@X08B@X05"@X08 engines@X05,@X08 and so on@X05.@X08 The
number following the letter is the approximate thrust of the engine@X05,@X08 in pounds@X05.@X08
the final number and letter is the time delay@X05,@X08 from the time that the thrust
period of engine burn ends until the ejection charge fires@X05; "@X083T@X05"@X08 indicates a
3 second delay@X05.
@X04NOTE@X05:@X08 an extremely effective rocket propellant can be made by mixing aluminum
dust with ammonium perchlorate and a very small amount of iron oxide@X05.
@X08The mixture is bound together by an epoxy@X05.