04-25-2019, 04:55 PM
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Freeform rocketry advocate.
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Join Date: Jan 2008
Location: Claremont, CA "The intellectual capitol of the world."-WSJ
Posts: 3,780
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Quote:
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Originally Posted by teflonrocketry1
I could easily print a scale coupler for the heavy wall LT-125 (or any other tubing size) in red ABS (similar properties to polystyrene) if you are interested. I could also print the nose cone for LT-125 in ABS plastic. PM me for details. It looks like LT125 is a heavy wall version of Centuri ST-13 tube.
Incidentally, that purple color on the Estes Eliminator tubes can be sanded off very easily and the tubes re-painted in any color. My friend Andrew did that for the Estes Pro Series Prowler kit and it came out looking great; he just couldn't fly a hot pink rocket!
I am also interested in the flaws of the 1340 fin can as these might be easily corrected during 3D printing. One option might be to print the fin can with slots to accept wood or fins made from some other material like G10.
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I would cheerfully make a 1340 kit but think red fin units are unobtanium.
Lee said the fin units had too many stress risers like the transition from the strake to the fin should have had a small curve. The launch lug was a bad idea in hindsight. He would have made it incrementally thicker although still with the draft. The leading edge of the unit gets chipped easily and pulls from the mold irregularly. Curve that with a small radius.
Tech Jerry
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