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It looks quite sturdy enough to take a beating upon landing. I've had plenty of landing mishaps in this research, and I'm taking steps to mitigate that. If you want to beef it up even more, Apogee is now marketing a 4" long external tube doubler for BT50. With this, there is no need for the external splines or internal motor mount extension I've been using.BT-20 mount
BT-50 Body Tube
BT-5 Tube fins
(Shorter tube fins are sturdier)
8 fins leaves a small gap
9 fins requires a bit of elliptical compression. But it gives me more surface area.
I'll go with 9
View attachment 464041View attachment 464042View attachment 464050
I had a similar issue with my backslider, X2C - it backslid alright, but it wanted to come in hot and heavy, ultimately suffering tube crimping. I attributed that to the small(?) fin area bequeathed by the adapted Estes E2X fin unit. Soon, I'll have a new backslider, hopefully with belt-and-suspenders overkill.it’s almost ballistic TAIL-first.
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