Estes JT-30C
 

Would like to clone the Estes Astron Mark II (K-2A). Anyone know a source for the JT-30C tube coupler? I can't seem to find it anywhere.

Thanks!
Carl

If you don't find one, you easily can make a tube coupler by cutting a section out of a larger diameter tube and gluing the section inside as reinforcement. It's a simple and easy process. Slip the cut piece of BT inside the BT-30 tube and mark the overlap to make the 2nd cut. I've done it with BT-20 all the way up to 8" HPR stuff.

Thanks! That's my 2nd choice.

http://www.erockets.biz/bt-30-2/

eRockets.biz sells BT-30 tubes. You could cut a piece and make a coupler as mentioned above. They also sell this solid balsa tube coupler that you could try hollowing out.
Just thoughts.

Cha

Some scrap BT-50 will work. Might have to massage the shape a tad to make sure it ends up nice and round.

For the Mark II , I'm guessing you want the fishpaper coupler due to the midbody seperation.

Semroc used to have those, surprised someone doesn't have an extra kicking around.

I think, if you had two of the BT20 couplers, maybe peel one layer of paper off the second one, glue on the first to make it larger od - hopefully to fit the BT30 ?


Good luck with the project, Mark II was my first ever rocket, and one of the early ones I cloned as well.

PS digging through more parts as I unbox the hoard after a few years in limbo - found a couple JT-30C, original vintage.
Drop me a note with address and I'll send you one.

AL

Thanks AL!!!
PM sent

Do you want this kit built like the original one ? If not, just use anything to join the tubes and add nose cone for a regular Mark. But I didn’t read this whole post. I have a box full of vintage Ivory BT 30 And 40 Tubes, and original components !
Danny.

I can help. Have Lots of them....
Danny