This is the Polecat Aerospace 1/3 scale kit, it is 5.5" dia. and 76" tall. It has flown on everything from H's to small M's!! The one in the pics I posted was not mine, but I do have one - it is one of my favorite models. I really like flying mine on a long-burn (4 secs) L730 that takes it up to 10K' or so. see here: http://www.polecataerospace.com/nikesmoke5-5.htm

I don't have any full/clean pics of mine - I had an altimeter setting problem and had a premature chute ejection while still ascending, so have some repairs to do. But it is a tough rocket and will fly again!

Barry