CompositeRockets at Yahoo! Groups

Re: Fin and Strake Alignment Jig

jimjarvis50 — Tue, 03 Nov 2009 02:41:21 GMT

I like the 45-degree feature and the pocket screws are nice too. When I've done stuff like this, I've found it difficult to get the horizontal support so that

Re: Fin and Strake Alignment Jig

42 — Mon, 02 Nov 2009 08:49:02 GMT

Great timing on the strake jig. I've been thinking about this for a 3" rocket. David

Re: Fin and Strake Alignment Jig

Cliff Sojourner — Sun, 01 Nov 2009 16:05:30 GMT

wow, nice work!! great design. how do you store it, assembled or can it break down? nice work on the rocket too.

Fin and Strake Alignment Jig

wa6tkq — Sun, 01 Nov 2009 15:50:53 GMT

I'm building a Standard(ish) Arm for my L3. Getting good alignment of the very long strakes - and not desiring to cut yet another set of cardboard templates -

A good glossary for composites

Phil — Sat, 31 Oct 2009 02:45:50 GMT

I found this composites glossary on the M.C. Gill web site. The "How it's Made" TV program showed the manufacturing process.

Re: Stressing question

john bolene — Sat, 17 Oct 2009 13:18:15 GMT

OK, sorry, guess I got in on the tail of the conversation On Fri, Oct 16, 2009 at 1:45 PM, Steve Peterson < ... -- John Bolene

Re: Stressing question

Steve Peterson — Fri, 16 Oct 2009 21:49:38 GMT

... Yes, but the original post and most of the follow-ups have been in the context of optimizing a carbon fiber tube. I doubt many people would go to the

Re: Stressing question

john bolene — Fri, 16 Oct 2009 16:12:05 GMT

I beg to differ as most couplers with standard materials such as paper and phenolic are less thickness than the body tube. Also body tubes are easy to

Re: Stressing question

Steve Peterson — Fri, 16 Oct 2009 13:35:36 GMT

Just to be clear, it is not the *coupler* that will break; the body tube breaks because the end of the coupler localizes the stresses in the body tube. It is

Re: Stressing question

john bolene — Fri, 16 Oct 2009 13:03:22 GMT

indeed, better to beef up the coupler with an inner liner or carbon fiber I have made 2 couplers out of AL bar stock to mainly protect the electronics in case

Re: Stressing question

Steve Peterson — Fri, 16 Oct 2009 11:58:03 GMT

... It might help a bit, but the max stress is right at the end of the coupler. By adding to the body tube just above the coupler, I think you're just ensuring

Re: Stressing question

jimjarvis50 — Fri, 16 Oct 2009 03:00:31 GMT

So going back to the pvc tube on a metal rod discussion, what happens if you double up the tube above a zipperless coupler (i.e., add a coupler tube inside the

Re: Stressing question

jeffshort2004 — Thu, 15 Oct 2009 13:06:24 GMT

Correct. I was addressing the comment that Nitrous is at Ambient. Basically pointing out that this is not always the case. JEff

Re: Stressing question

Warren Musselman — Thu, 15 Oct 2009 12:33:33 GMT

Ah yes, Comsol Multi-Physics. One of the best mechanical modeling packages going. Think $20 Grand plus a couple grand a year in maintenance. A couple of the

Re: Stressing question

william colburn — Thu, 15 Oct 2009 05:02:06 GMT

Griffith was worried about the cold temp. BC Gravity is a Stern Mistress.. The Tick. ... From: jeffshort2004 Subject: