Wednesday, September 3, 2014

TR-1 SRM update

I ran the motor through SRM a few times playing around with some of the numbers mostly because of  the switch from a Sorbitol based propellant to Dextrose based.  Ultimately the only change I'm making is the change in sugar type.  This has a few effects on the motor, all relatively minor.  The overall burn time of the motor is reduced by about 1/2 a second, average thrust goes up a bit, and the MEOP goes up to 1200 psi from 1050 psi.  The retention screws are designed to sheer at 1800 psi so the design safety factor is still a fairly conservative 1.5.

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