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Old 05-21-2020, 08:08 AM
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AeroTech AeroTech is offline
Join Date: Dec 2009
Posts: 75

The nozzle expansion ratio is actually pretty close to optimum for the motor operating pressure, which is low by typical composite propellant model rocket motor standards.

Originally Posted by Jerry Irvine
The exit cone is surprisingly short so is under expanded. They might be slightly better off by increasing the expansion angle to >30 degrees, perhaps 45 degrees. Heck, make it a curved shape since it is SU ceramic!
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