MIT Rocket Team P19000 Motor Test

The MIT Rocket Team recently tested their first ‘P’ class rocket motor (Wikipedia has a good table on the class ranges) at the end of February.

… This test produced 65,077 Ns at a peak pressure of 1440 psi and 22,970 N of thrust.

For all my imperial unit readers, that is 5163lbf of thrust, but the test did not go entirely to plan with the motor ejecting several thermal liners during the burn.
The team states,

…As the design pressure and thrust of this motor were greatly exceeded, we think it likely that aluminum combustion (triggered by the increased residency time in a longer motor) lead to the unplanned increase in burn rate, the increase in combustion pressure, and then triggered the cascade of failures.

The motor did well to hold up, of which I look forward to the next test. This size motor will propel the teams Hermes rocket to 80,000ft in June at Spaceport America.

You can read the team’s full update here.

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