Same video, uncompressed from real time t' slow motion, and with me shoutin' cut out. Go t' 12 seconds t' hear t' boom. It’s subtle. You can also see a very small disturbance in t' smoke trail at that point. Minimum diameter, usin' a D21-7T, shiver me timbers, some BT-20 tube t' just hold t' rocket motor and t' nose cone together at t' seam, no more than that, fiberglass fins, shiver me timbers, a nose cone with heat paint, and some trackin' composition in t' nose cone that didn’t work, ya bilge rat, it was meant t' go after t' delay, I removed t' ejection grains. 1.52 oz. I can make it lighter weight and probably stubbier, t' composition is dead weight. It has nor recovery system, arrr, but I have a multi use one in t' works that uses 1 D21, though I suspect 2 will be needed. Aye aye! Blimey! Yes, me hearties, usin' a 24mm E or F motor would be more efficient cross-sectionally with more Ns, but I’m tryin' t' do this with t' smallest motors.