Rocsim 9 question

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Flash

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I'm designing some 3" dia. size rockets with a 1.210" OD x 1.140" ID 29mm Motor tube inside a Mercury Engineering/ Balsa Machine Shop OD: 3.0000" x ID: 2.9300" Main Air-frame. Can I trust the auto Fin tab depth feature? Rocsim 9 says the tab depth should be .8950 for this setup.

The reason I ask is because I would hate to have cut or cut the fin tabs to short or the wrong size.

Thank you!
 
That is correct. To check with a calculator, just half your OD's and add the calculated depth. .605 + 1.5 + .8950 = 3.
 
Thank you! Just had a mental block, that is easy enough!
 
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