02-17-2009, 09:10 AM
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Mr. Dual Eggloft
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Join Date: Aug 2008
Location: Illinois: where our Governors make our license plates.
Posts: 585
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Quote:
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Originally Posted by Solomoriah
I suspect the 3 second delay will severely limit clustering the A10-3T. It's a hard-kicking engine with almost no follow-through; a heavy enough rocket to hold it down to a low DV might be too heavy for the low tail of the thrust curve.
Just musing, no simulations or data to back it up.
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Our club members D80 actually works pretty well on a cluster of 8 A10-3Ts.
Take another look at the NAR certification sheet for the A10. If you average the WHOLE burn time, it's an A2, not an A10. It's got a .6 second very low thrust tail in addition to the delay.
And I might as well take this opportunity to point out that motors rarely have the delay they are labeled with. In the case of the A10-3T the delay is 2.35 seconds, not 3. Virtually all of the Estes motors have significantly shorter than advertised delays. If you are worried about ejection velocity, check the data sheet rather than use the number the motor is marked with.
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