Ken,

I've got two short pieces of 38mm MMT you can have. One is 4 1/2" and the other is 4 7/16" long. I also have a piece 12" long that I paid $4.00 for that you can have. Send me a message offline if you want any of those.

Ron Dreasher

Ken, I've got three of the 1 grainers and two of the two that I'd be happy to loan but won't gift. Don't have any motor tube that I know of but I did use insulation foam (ordinary plumbing wrap stuff for water heaters and the like) in my CROC's rocket that is a nice fit for the 38's if you can figure out a better way to externally retain the cases. The foam stuff gets a little brittle after the epoxy sets up in it.

Joe, is it 2 or 3 that you have? Loaning would be great, as I don't (or at least I didn't think I would) have much use for a 38mm G in normal usage.

I'll get with you if I need a test fit, and definitely when I want to fly again!

Guess it's time to start sanding off Art's paint off the other end this time. Bah!

Ken

3 One's, 2 two's, 2 three's. And Tim Thomas probably has a few loaners too.

I finally got started with the retrofit of the 38's. Making it so the 2-grains will fit.

3 pics at:

http://www.putfile.com/pic/8430955

Ken

Update time.

I finally got the glassing done. 6oz strips in the fillets, 6oz tip-to-tip, and 1.5oz sanding veil. This was my first tip-to-tip job, and twas not easy. Looks a little ugly, but should clean up nicely with sanding and a bit of fill. Definitely sturdier than before!

Ken

Take away the fins, And that reminds me of a 38 MM Gatling gun. 😯
I can imagine the Governor of California, carrying that trough the jungle right now, shooting aliens. 😉

Here is a new project I'm working on, a 54 mm surrounded by eight 38 mm motors in a 6 inch body tube.

Doug

Here is a new project I'm working on, a 54 mm surrounded by eight 38 mm motors in a 6 inch body tube.

Doug

WOW!!!
NOW THATS FOR THE GOV.

Doug, you DO know how to do it right... Damn...

Warren

Doug,

That's way cool. It look's like a slight canter to the outboards. Is that the case or just the angle of the photo?

Are you going to light them all off at once?

It look's like a slight canter to the outboards. Is that the case or just the angle of the photo? Are you going to light them all off at once?

Yes the outboards are angled at just over 3 degrees so I didn't have to worry about nose cones on them. Actually I wanted the thrust of the outboard going through the Cg "in case". And yes the plan is to light them all on the pad. This is the first stage of a two stage rocket I'm building. At full power it would have a K700 and eight J350's for a mid size M with very high thrust to get it moving. Here are a few more shots of the booster section.

Doug

OK Doug, you win. 😛

Doug, that is beyond amazing. Two questions:

a.) how did you discern the pattern for cutting the tapered holes into the bigger tube? I assume this mathmatically derived... I'm just curious how you even begin to derive the pattern for where to make the cuts?

b.) how did you actually cut the FWFT? what tool did you use?

I'm glad I don't have to clean all those casings 😉 But I will volunteer to clean one or two. That is an incredible project!

FWIW, I have seen some really large clusters lifted with Cesaroni loads. The bp disc at the top of the core of a Pro38 load makes ignition exceedingly reliable. They might be good candidates for trying to light 8 at a time - though it would be easier to round up 8 cases for J350s than 8 ea. Pro38s.

JW