I would use Blue tube, not to pricey and very strong. Why is it 8 feet long?!
Thanks! I had forgotten about BT. About the length, why not? I am not going for performance!
[POW]Eagle159;273445 said:Cause it looks cool!
What about the Estes Mean Machine? Isn't it similar proportions?
Well, I guess I have some thinking to do... Thanks for pointing this out and preventing me from doing something stupid. That's what TRF is for!
Not stupid. Unique!
Bryce
I've built a 29mm Blackhawk-beater (using no CF or glass) and it's been to just around mach and back with no damage. I used LOC 29mm motor mount tubing and Blue Tube connectors, both from Apogee, and both pretty cheap.
How long was it?
6 feet x 40mm, so similar to my fiberglass hpr rocket above, but with a low power motor. And lets not pretend that mean machines don't fold up from time to time : )
You are talking 30% longer and 25% thinner! If you want to go cheap, 9 ft of 29mm phenolic tubing from Giant Leap is not so bad. (Three sections 36 inches each, plus two 12 inch couplers will maybe run you $50.) One benefit, despite my concerns above, is that phenolic wont be as dangerous if there is a recovery failure. But either way, these long rockets tend to flat spin if there is a recovery failure.
Your RSO may not let it fly to be honest. Another issue is how to do the fins, recovery, and what nosecone to use etc. Also what motors are best? High thrust to get a heavy rocket moving, but not so much as to flex it in flight? Also low wind would be crucial for this one.
LOC tube is plenty strong for such a project. Keep it below 85% mach and it will hold up suprisingly well.
Full length (fin can + ebay + nose section) it's 1.35 meters - 53 inches.
29mm bluetube is pretty thick walled. As long as you use a long coupler I'd imagine it'd do well. I've never tried it, but it'd be interesting to see.
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