For a few years now, I have flown 75mm and 54mm minimum diameter projects. I always liked the idea of a simple launch tower. I have been using G-10 plates drilled and cut to match the project at hand. The plates are sized to fit the OD of the tube (including any additional OD added my carbon or fiberglass fin-to-fin laminations), sized slightly larger than the span of the fins. The plates are bolted to 1010 series 80/20 Inc rails via small 90 degree angle brackets. If the rocket is 4 fin, it needs 4 rails. 3 rails for 3 fin, you get the idea. Drilling and cutting these custom plates has been a laborious effort and would be better suited for the precision of CNC.
54mm minimum diameter projects are popular, but I have to be honest, I really don’t know if there is any marketability for a “custom” tower sized for a given OD and fin number that is NOT adjustable, but I present the idea in case you want to chew on it a bit…
Yes I realize that you said you can do 6” by 16”, but I wanted to share the idea regardless…
75mm plates for a 4 fin rocket:
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54mm plates for a 3 fin rocket:
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