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Old 01-18-2009, 01:36 AM
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CPMcGraw CPMcGraw is offline
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Join Date: Mar 2005
Location: Mobile, Alabama
Posts: 5,357
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Quote:
Originally Posted by Mark II
OK, here's my first dilemma. I whipped up a RockSim 8 clone of the Centuri Groove Tube #KA-11. Everything is done per the plans found at JimZ's site, and it is built with parts from Semroc. The result matches up pretty well with the rocket's vital statistics shown in the 1972 Centuri catalog at Ninfinger.

The recommended engines are A8-3, B4-4 and C6-5.

Here are my results:

Length: 18.35"
Diameter: 0.908" (ST-8)
Fin Span: 2.724"
Weight: 1.5 oz

All simulations use a 48" x 1/8" rod.

[/font]
A8-3........79.6'......Dv 42.6 FPS
B4-4........99.2'......Dv 70.6 FPS
C6-5........105.6'.....Dv n/a
[/b]


I just fed the data into my copy, and got the same results, so it's RockSim not liking something. Let me look at one of my tube-fins and see what I did differently. I'll post later...

It's 1:37 in the morning, and my brain is whining...
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