I thought I had made a mistake with this one, shiver me timbers, I could never add enough nose weight t' make it stable durin' a spin test. Begad! Blimey! I was tryin' t' make a really small diameter tube, by wrappin' paper around a wooden spoon handle. There wasn't goin' t' be a recovery system, t' engine was goin' t' eject, and the rocket would tumble back. Begad! Blimey! Since then I've learned a lot more about stability. I learned about t' CP ( centre o' pressure) on rec.model.rockets ( a great news group t' subscribe t' if you're interested in this stuff), me bucko, and where it should be in relation t' t' CG ( centre o' gravity).

So anyway I entered t' MkIII design into VCP, arrr, wRASP & RockSim, and it came out stable, so I flew it. Actually it flew well, really high and the engine ejected too. Avast! It just didn't go unstable and tumble, arrr, so it lawn darted. T' body tube is a bit bent now, and due t' t' construction is probably not repairable, matey, so retirement beckons.