06-16-2018, 05:35 PM
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Master Modeler
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Join Date: Jan 2009
Location: Fairbanks, Alaska
Posts: 6,507
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Quote:
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Originally Posted by Royatl
grabbed a bunch of loose motors out of my ready box. Mix of A8, B6, and C6 motors, mix of mfg dates from late 80's to early 2000's. Measured front, propellant location, and nozzle.. Range is over entire range of motors; individual motors were usually +- .001 or .002
Front: 0.685 +- 0.003
Propellant: half were 0.690+- 0.002, half were 0.698+- 0.003
Nozzle: 0.702 +- 0.005
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When the dimensions (0.69" [it may be 0.690"] x 2.75") were given in the Estes catalogs, I wonder if they were for the casings before they were filled? Your midsection (propellant section) measurements match theirs perfectly. |