04-03-2013, 03:23 AM
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Master Modeler
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Join Date: Jan 2009
Location: Fairbanks, Alaska
Posts: 6,507
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Quote:
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Originally Posted by Doug Sams
Greg,
Most of the old motor cases had extra thick walls, similar in thickness to a T motor inserted into a spent case. The mass is fairly close. I've flown stock Midgets using the 18-mm adapted combo of A10-0T to ½A3-4T many times with no stability issues.
Doug
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I had equally good results flying an Estes Sprite clone using a 13 mm-to-shorty "conversion" motor adaptor made from BT-5 with two centering rings and a mini motor clip. It could also be used in an original (shorty motor powered) Centuri Lil' Herc. It would even be "NAR Kosher" for club launches if a streamer was taped to the mini motor adaptor's BT-5 tube and wrapped around it before the adaptor was slipped into the rocket; the shorty motor adaptor would descend under its streamer while the Lil' Herc used tumble recovery as per its design. |