Doug Gerrard

Ken, Since you are still doing construction, I recommend running small tubes from the forward compartment to the aft of the motors. There are several different ways to airstart motors but if you have...

I have done several projects by vacuum bagging the fins. But I have yet to do balsa or double wedge shaped. I usually start with a foam or honeycomb composite to start with and then vacuum bag more ...

Top Flight Recovery has the 1.1 oz very thin rip stop nylon. I've used them before when I need a big chute in a small space. Doug

I've noticed the lack of postings here recently and I figured all of you are frantically getting ready for Oktoberfest like me. So I thought I would take a moment to find out whats the status of, you...

has anyone, or does everyone, use KILZ for priming and filling the holes in composite weave? I have heard about it but have never used it. What I found that really seems to work well for fins is just ...

😳 I like the booster seperation. Looks like it worked out well. I made several changes because of that and even a second test. That video you see is too "violent" and it blows them off "tail" first....

Looks like Freeze Frame is a go, probably... The rocket is finished and you can check out the paint job at if you like. I still have a few issues to work out but if everythng falls into place I shou...

Thanks for the link Edward, I had not seen that site. Not only do I think his analysis and assumptions are full of Cr*p even his so called test video is misleading. He states Note the rattling that ...

Never once have I had a piston jam. Same here, I've never had a piston jam. I do prefer the "looser" fit and I was wondering, what is the problem with a loose fit? I still use some kind of protecti...

I might if you tell me what a PM is? I don't care for acronyms. Doug

Yes, I have a few you can buy off of me 😉 The device itself is OK. It has the advantage of the on board battery which is very convenient. It works reliably for general recovery. The problems I ha...

gotta be faster Conway... But its true what Conway says. On my L3 flight I was signed off by my guy but there was another TAP member there that said he wouldn't. Go figure... The criteria is largl...

can it be turned on/off FROM the outside via the vent port... is this acceptable for L3? Yes, that should be acceptable but you must ask your TAP member. His opinion is the only one that matters in ...

Thank you very much. I got the impression it should be HOURS not days or even weeks. I do have 1500 grit sandpaper and I was planning on wet sanding it. Its turning out OK for an amature and I have...

Conway, or anyone, Am I suppose to buff the clear coat "soon" after applying? I thought I heard someone told me to do that to remove imperfections. How soon is too soon?, Can I wait? By the way, I w...