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US 4,355,577 AGranted
Model rocket propulsion system
OwnerMichael S. Ady, Roger F. Lufkin +1inventors
InventorsMichael S. Ady, Roger F. Lufkin, Kevin L. Lynch
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Abstract
The invention relates generally to a small model rocket motor. The motor includes a plastic composite propellant, and plastic ablative nozzle, and provides means for producing thrust, a time delay, and a charge to activate external devices of desirable design.
Claims5
A propulsion motor for a toy rocket comprising:
- (a) an elongate, open ended tubular casing;
- (b) nozzle means formed from a plastic composition comprising the following ingredients in the following percentages by weight ranges:
- ______________________________________ Furan Resin Binder (liquid) 40-99 Corn Starch Filler (fine powder) 0-60 Catalyst 1-5;
- and ______________________________________
- located within said casing adjacent the lower end thereof, said nozzle means having a passageway formed longitudinally therethrough, which passageway, at one end, is provided with a restricted throat section;
- (c) a solid propellant grain located within said casing intermediate the length thereof, said grain having a substantially cylindrical elongate burning port extending partway therethrough, said port having a diameter substantially greater than the diameter of said nozzle throat section, said grain being further located within said casing adjacent said nozzle means such that said port is indexed with said passageway, and;
- (d) ejection charge means, located within said casing in intimate contact with the top end surface of said propellant grain.
4 more elements
Dependencies are inferred from the claim text.