Here is my latest scratch build. I call it the "Five Finger Discount". I have used wood filler to "fill in fillets on top of the normal wood glue fillets. According to my son it should get close to 1000 feet on a C engine.
Andrew
I design Um Not Fly Um
Here is my latest scratch build. I call it the "Five Finger Discount". I have used wood filler to "fill in fillets on top of the normal wood glue fillets. According to my son it should get close to 1000 feet on a C engine.
Andrew
doubtful stability
Airfoil those fins, and seal/smooth the surface a bit, and you might go well past 1000 feet.
Round the leading edge and taper the rear half of the fin chord down to a thin trailing edge. Throw on a light coating of sealer or primer, and then sand most of it back off, and the fin surfaces should be a lot more smooth than raw balsa.
I hope you have a huge field to launch from, and the grass is all mowed short, because you're gonna need all the help you can get---
Everyone has a right to be stupid, some people abuse the privilege
Rocket Powered Preacher
Andrew,Originally Posted by accooper
How big is that thing? it looks to be minimum diameter.
Powderburner is spot on about improving performance but if you want to fly it at an AR launch, draggier is probably better. Our field is modest.
I look forward to seeing it up close.
__________________
John A. Lee O.S.L.
Alamo Rocketeers NAR Section 661
NAR 87285, L1 8 March 2008
TRA 03040, L1 8 March 2008
Photos of the "Fleet": http://www.flickr.com/photos/23694991@N03/
I used to tell Mom, "...I want to fly rockets when I grow up!"
She said, "Make up your mind, you can't do both!"
I design Um Not Fly Um
It uses a BT-55 tube, and is about 17 or 18 inches tall. I need to start including a ruler in my pictures to give people some Idea about size.
Andrew
I design Um Not Fly Um
She flew last weekend. Great on a B6-4, better on a C6-3, marginal on an A8-3. Anything smaller would be a suicide run.
Andrew
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