you can't be in this hobby for long periods and not have lawn darts...
Those of you who have never had one? well, it's either "Welcome to ROcketry!" cuz yer new, or, "You ain't flyin' enough"...
My first was when I was about 11-12 years old, with my grand dad out in the rock quary. My Saturn V in the late 60's
This was the one that had the 3 C engine cluster motor mount that was interchangable with an optional D motor mount that you could buy. I bought the optional mount and launched it with a D13 (yea, the imfamous D-kaboom-13)
The way the motor mount work is it was a BT63 (or there abouts) main snuffer tube and the motor mount was built inside a short length of BT-60. The BT60 engine mount installed into the rocket like a large motor in that the snuffer tube has an "engine block" in it and used an engine hook to secure the mount.
didn't work very well... I knew I was in trouble when I heard the ejection charge and saw the motor mount shoot out the back of the Saturn like it was fired from a cannon....
She re-kitted herself right befor my eyes, telescoping up into such a tiny package i thought I'd cry! That was my first lesson in *repair*. My grand dad showed me how to use the tools and techniques to completely rebuild it and we did (only I put TWO engine hooks on that tube, 180 degrees apart. Got many more flights out of it befor i lost it.
jim