03-10-2006, 01:46 PM
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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
Add more to your build pile Craig. Last year when I came up with this design style I came up with a few more just by changing the main wings. Here is one more, Mini Jet #2. Only 15 more to go. 
PS. I also have launch field problem as I live in the middle of a stinking rain forest here in WA. surrounder by rocket eating TREES. 
James Pierson
NAR #77907 |
Your weather has been getting as much national attention as ours down here... . Our "windy & rainy season" is just about to start...
Similar tweaking for this one, you can reduce the ballast in the nose to 0.15 oz, which is a hairsbreath above 1/8 oz. This provides a margin of 1.26, which is more than enough. Don't reduce it below this weight, though, as the balance is a bit critical for this bird. James has balanced his model with a large stability margin, which is good and doesn't compromise much on performance. I trimmed out the extra weight to find the "optimal" margin, and this gave me as much as 60' of extra altitude using the A3-4T. Keep this in mind -- an altitude of 740' versus 680' doesn't change the fact that you still can't see the model reaching apogee...
Use the 1/2A3-4T for most flying, as this keeps the model below 350', which is just at the edge of visual range.
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