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Old 11-26-2021, 02:32 AM
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Tau Zero Tau Zero is offline
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Join Date: Mar 2005
Location: Twin Falls, Idaho, USA
Posts: 2,254

Originally Posted by RobVG
In the Apogee newsletter #154 Bruce Levison shows how to use a zero mass cone at the back of the rocket to simulate base drag.

Openrocket understates the stability of short stubby rockets and this trick is supposed to compensate for it.

My problem is, he didn't clearly define just what qualifies as a short stubby rocket.

He said the trick is for rockets with "much less than the normal 10 to 1" length to diameter ratio.

He's pretty exact with how to draw the cone but not with what rockets you should apply it to.

I used this technique on a slightly upscaled Centuri Vector-V ("Good heavens!") 10 years ago:
Jay Goemmer
"Centuri Guy"/"Tau Zero"
YORF Member 28
Semroc SAM #0029
NAR 86131

"Your lightyears may vary."

“Centuri fret buzz in an updated form.”
Bill “Wallyum” Eichelberger re: Estes Flutter-By
03 Sept 2014
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