This one is a challenge, since you have succeeded before, I expect this will work. Is Open Rocket really able to input the effect of GDS and Spin Tabs. I am guessing neither is readily amenable to your wonderfully documented Swing Tests.
Question: this is quite different from your usual rear eject “spools”, although similar I think to your canted motors fighter jet rocket (I fergit the name.). How do you put a rear cone or cover that contains the parachute, that resists both gravity and acceleration forces but YIELDS to ejection forces? Seems like you need a Goldilocks touch, not too tight, not too loose.
Are the insides of the “shroud/manifolds” lined with anything to resist ejection charge temperatures?
How do you get motors in and more importantly out?
How did you do the vents? do you have an extra long "jawed" hole punch? Those vents look perfectly clean and round, but a long distance from the tail end. I've had this problem on a number of my birds (although the hole needed to be about 2 and 1/4 inches from the tail), and my solutions were far less neat and elegant..
How did you do the vents?
Will the forward fins/canards be canted or just have a positive airfoil on one side?
Getting the high roll rate, and keeping it through the coast phase, when the three body tubes make it like spinning a 1×3 board seems, um, sporty. You have a very good track record with far out designs, so I think you have a chance. Still, um... wow. (I also wonder what happens with GDS when the forces are off center, which they will be due to engine performance variations. But symmetry is overrated, and the roll drag gives me a lot more concern.)
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