Originally Posted by Jerry Irvine

It was simply an intuitive design that in practice worked out. I don't think I ever did a single ground test until I made my first motor. Always flight tests. Why waste the motor? That particular configuration was first tested in my Enerjet 2650 which came 1 stage but I added a stage to it so I could fly 3x F100-0 to 3x F100-10. After many such flights I later did 3x F67 to 3x F67 and 3x F67 to 3x G76. Once I did the U.S. Rockets version of the 2650 in circa 1980 I was able to obtain H motors as well. Once I made motors I was able to "obtain" J motors as well. Probably my most satisfying flight with a U.S. Rockets 2650 was 3x H240 to 3x J160.

The 2225 came along almost a year later along with a bevy of U.S. Rockets kits, about a dozen with BT-70HD I call BT-22.

The Hi-Test 2225 was one of the most popular rockets at LDRS-1. There were several Hi-Test 2650's as well.

Jerry

Originally Posted by tbzep

Our open air gap staged Aerobee Hi flights were 100% successful. The particular photo is the third flight staging at low altitude with an A8-0 to B6-4. No enhancements needed, no fuses, no electronics.
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