Transitions and body tubes

[Jacktango22]

Back into the Hobby now that I am retired, and really enjoyed designing and building my own rockets using open rocket software. I’ve built kit’s but the challenge to me is “design build fly.”

I want my next build to be a BT 70 sustainer and a BT 60 on top. I have a balsa transition.

Any advice as I start to think about this would be appreciated.

Mid power only D,E,and F

thanks

 

[rharshberger]

Back into the Hobby now that I am retired, and really enjoyed designing and building my own rockets using open rocket software. I’ve built kit’s but the challenge to me is “design build fly.”

I want my next build to be a BT 70 sustainer and a BT 60 on top. I have a balsa transition.

Any advice as I start to think about this would be appreciated.

Mid power only D,E,and F

thanks

Two centering rings and a cardstock transition hardened with CA glue, old school. Balsa works just as well, but I like the fact that paper transitions with practice are easy to make.

 

[David_Stack]

If you are looking for design 'inspiration', how about either the LOC 'Lil Diter' or Norad. Since both are based on 3.1" diameter tubes, you could scale them down to your BT-70...

 

[bjphoenix]

Back into the Hobby now that I am retired, and really enjoyed designing and building my own rockets using open rocket software. I’ve built kit’s but the challenge to me is “design build fly.”

I want my next build to be a BT 70 sustainer and a BT 60 on top. I have a balsa transition.

Any advice as I start to think about this would be appreciated.

Mid power only D,E,and F

thanks

Are you intending a multistage? It sounds like it could work with black powder D and E motors. If you want a single stage then D, E and F could work. I would recommend building it in Open Rocket or Rocksim so you know how it would fly with different motors.

 

[astronwolf]

I'm reminded of the Grumpy Dog, also based on BT-70 and BT-60 airframes. It has a BT-70 sustainer.
https://www.oldrocketplans.com/narts/SP101_GrumpyDog.pdf

 

[loopy]

Look at the LOC Expediter, Norad/Norad Pro Maxx, or Cyclotron.

 

[tsmith1315]

And the Estes Argent