Hello All,

The MPC/AVI P-Chuter, a parachute duration rocket (it won a bronze medal at the 1972 World Championships for Space Models at Vrsac, Yugoslavia), is another Miniroc (13 mm motor powered) kit for which no plans appear to exist, *but*... I may have found a way around this problem (and I'm hoping that someone else here on YORF could confirm it); it goes like this:

The P-Chuter is listed in the 1973 AVI catalog (see: http://www.ninfinger.org/rockets/nostalgia/73avi04.html ). The description of the kit is so complete (length: 305 mm [12"], diameter: 20 mm [0.79"--actually, 0.787", as in the Quest catalogs], 10-degree boat-tail, etc.) that, given a fin pattern, anyone could clone the P-Chuter, and:

While I haven't come across a fin pattern for the P-Chuter, I suspect that I may already have one--the fins on G. Harry Stine's Paradigm-5 mini motor design (see: http://www.apogeerockets.com/educat...wsletter225.pdf [it can also be seen in most editions of his "Handbook of Model Rocketry," in the chapter titled, 'Model Rocket Aerodynamics') look like the P-Chuter's fins. He was "enamored with" clipped delta fins of those proportions, and those particular clipped delta fins' dimensions (root chord: 1", tip chord: 0.5", root-to-tip span: 1") look right for the P-Chuter. If anyone here has a P-Chuter fin pattern, or even "just" has a built P-Chuter and could measure its fin dimensions, we could know for sure. Also:

The P-Chuter used a 3-caliber, injection-molded paraboloid nose cone (whose exposed portion was 2.53” [64.27 mm] long). This was the same one that Quest used (under the name of PNC20) in their earlier kits (see: http://www.ninfinger.org/rockets/ca.../93quest22.html and http://www.ninfinger.org/rockets/nostalgia/92qst16.html ). The newer, replacement nose cone that Quest now uses may be the same length (if not, its length is very similar), but it is a blow-molded, one-piece nose cone, and it may be a tangent ogive rather than a paraboloid, although it's rather hard to tell, from the picture on the Quest website (see: http://www.questaerospace.com/20mm_...5_16432958.aspx ).

I hope this information will be useful, and many thanks to anyone who can help!

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