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Old 01-25-2008, 03:07 PM
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dbarrym
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Default RE: Post some pics!

Most MPR and HPR motors are reloadable - the engine case and front and rear "closures" are made from precision machined aluminum and are re-used. The motors are assembled much like the Space Suttle SRB's - using a sacrificial liner (insulator), pre-cast propellant sections (cast in cardboard tubes), a single-use nozzle, and various O-rings to seal up the works.

The motors are very simple to assemble, but like NASA, sometimes mistakes get made...here's the result of forgetting to install a forward closure O-ring...makes for a spectacular result! I should add that this is an extremely rare occurence.

Barry

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