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Old 06-22-2018, 10:07 PM
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Royatl Royatl is offline
SPEV/Orion wrangler
 
Join Date: Mar 2005
Location: Atlanta, GA
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Quote:
Originally Posted by blackshire
...And that's not even considering their performance tolerances (the static test stand instrumentation back then might not even have been electronic, but mechanical or electro-mechanical). If Estes was still using firework piece casings then, that might account for their looser dimensional tolerances. I just hope that the "wall thickness-trimmed" new batch of Q-Jet motors won't be too heat-deform-able (like the bent ejected casing that BEC reported), or transmit too much of the heat to their casing surfaces.


Vern has said their "test" stand back then was a small postal scale, poorly damped, which lead to such anomalies as the B16 motor, as in 16 *pounds* average thrust, which was later corrected to three pounds thrust. The B3 (predecessor to the metric B14) could floor the undamped scale by inertia, leading Vern to believe that it was indeed producing 16 pounds of thrust.
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