blackjack2564
Crazy Jim's Gone Banana's
. Plus, CTI makes a tapered 29mm aft retainer than comes up to flush with a 29mm airframe. Unfortunately, apart from heavy sanding and grinding of aircraft-grade aluminum, that means that the sustainer needs to be coupled to the booster externally, rather than internally. So I am fabricating a sleeve that will be glued to the interstage coupler. The sleeve will extend 1.5" from the coupler and the sustainer will slide inside it. and rest on the end of the coupler.
View attachment 298321
Man I hate to tell you this...after all the work you did....but :
Your totally wrong about the tapered closure, it is in fact, made for STAGING..... it is flush with motor case, not airframe. No need to grind/sand anything. It already fits. You would just have to glue a motor block in your airframe, to keep motor in place.
Her's mine:
It comes with a ring/washer that goes over the threads and THAT is flush with airframe.
Here's mine easily sliding in/out of a 29mm motor tube...
Hopefully it's not too late, sure makes for a simpler/neater way to do it.
I must add this...at least MINE came that way, I don't think they have changed it.