Adrian

I'll be there. I don't know what I'll have to fly yet, but August 1 to October is too long to go without flying. I love flying from Hartsel for flights under 14kft.

Just read another post about Tim. Hey Tim, what companys do you carry? CTI any others? thanks for the homework help.$160 seems like alot. I've only built 4 rockets, flown 2 lots, an I204 that seems li...

It was a very nice day at the North site. There was a cert or two, and some notable flights. Sean Serell flew a G-to-G on a nice boost that claimed a Tripoli 2 stage record of 9,200'. IIRC Sean said...

I double-checked my tower and indeed the max fin circle diameter is just over 10". I could actually extend that a half inch or a bit more with some judicious belt-sanding, but not to 11.9".

Just a reminder, the rocketry calendar is incorrect for this weekend. We're only flying on Saturday this time.

Hmm, I just check my RockSim file and I have a Span Diameter of 11.9 inches. It sounds like Adrian's tower won't work for me. Ed, Can I assist in hauling something for the large 3" tower? What dime...

Everything is coming together for me to be there on Saturday, so yes, you can plan on my tower being there. I'd donate the tower to the club except that sometimes I want it at TC Hartsel launches too....

I'm planning to be there with my 8' tower that has been used at NCR since MHM. If my plans change then perhaps someone can pick it up down here. It disassembles nicely so it actually fits in most ca...

Try this:

Oh, I thought you meant diameter. Now I get it that you mean 1/16" thickness.

Cool. It sounds like brazing is a valuable skill to have. How much does the fincan weigh? What's the 1/16" tube for?

Good question. I'm glad you asked. The quickie analysis I gave was for the flat part of the fin, where the two face sheets are held apart by 0.04" of something, where that something could be G10 or ...

Thanks for the great shots, Ray. After Chris posted that second one at Rocketry Forum, I've been using it as my desktop on my work computer. What is the frame rate of your camera?

After thinking about it some more, I realized that just compressing the fuel grains wouldn't be a very representative test, considering the higher temperatures, internal pressure, and reduction in mas...

Thanks for the info. Maybe the lack of fin sweep was a contributing factor then. The shock wave would definitely be along the whole leading edge, not just the root. Worse, the rectangular-ish shape g...