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This nozzle was turned to accommodate the OW-152-4G #1 hotfire. 

Design and Manufacture

CAD, drawings, etc here.

Charlie G turned this nozzle from 5.0 in stock in the AeroAstro machine shop. Due to his crappy caliper skills, the throat was turned to 1.4 in diameter.

PDF
name6in-1255_333 nozzle_rev3.PDF
 

Post Fire Review

The nozzle cracked badly. Pictures below.

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