04-06-2006, 12:28 AM
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BARCLONE Rocketry
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Join Date: Mar 2005
Location: Mobile, Alabama
Posts: 5,357
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Quote:
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Originally Posted by James Pierson
Good idea with the card stock for fins Craig. Where can I get some of Carl's cardstocks material? I wonder if this cardstock is compariable in wieght to 3/32 balsa?
Also Craig, notice the difference between Scrappy and Thunder Strike designs. The center tube in Thunder Srtike is classified by Rocsim as a regular BT and not an inside tube like Scrappy has. I needed the center BT to be a regular BT to be able to put the fin set on the center Bt. It took me a long time to figure that one out.  Just thought you might be interested. 
James Pierson
NAR #77907 |
There's a trick to that, too...
You define a "reference tube" of the same dimension as the inside tube, which has no weight (actually, make it 0.0001 oz) and 0.00 opacity (in other words, it's weightless and invisible) and which fits in place directly between the front and rear sections. You make it the same length as the distance you want the sections to be apart. You can then stick fins onto this tube as if it were actually there...
Study the attached file...
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