Given that I had to cut out a section of body tube just above the existing conical ring, I took you up on your suggestion
@BABAR. I have increased the outside diameter to 9 inches, which required me to print the ring in 5 parts (my printer has a max build footprint of 5.5in x 5.5in) Rocksim model shows some margin for stability, and I will swing test with the ring temporarily in place to confirm stability. Mass of the new ring is 60g, while the old one was about 40g, so it did go up some.
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First, still looks great.
second, comparing this to previous version sim, your mass is as you say up 20 grams, but your length is down 6 inches. Looks great either way, just wondering why the change?
Stability dropped below 1 caliber.
At 200 grams currently, you have plenty of room before you max out the lift capacity of your D12.
it may fly fine the way it is now, a stable swing test would certainly encouraging.
potential issues with the shorter tube:
recovery gear space will be at a premium, even tighter than before.
If stability really IS marginal, I suspect you can easily get back to what you had before by restoring 2 or 3 inches of tube length, I don’t think you will need to go back to the full 20” previously. This will both increase your stability and but you a little more room for wadding and chute. It won’t cost much in extra mass, 5-10 grams maybe?
does losing the canted ring for a straight ring cost you or gain you in the stability market? I am guessing the canted ring adds more drag and provides more stability than straight, but i am guessing.
your design gives me an idea for a dual TYPE of recovery for a rocket, eject the ring fin and motor mount tube with a windowed ring for horizontal spin, but keep it connected as one piece with a snap swivel (to allow to spin) with the body of the rocket (in this case the actual BODY of the Mandalorian!) which comes down under a chute. Biggest problem I see is unlikely the snap swivel can keep up with the spin on the ring (it’s gonna whirl like the proverbial Dervish!) and will likely tangle up the cord