10-02-2016, 01:20 AM
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Master Modeler
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Join Date: Jan 2009
Location: Fairbanks, Alaska
Posts: 6,507
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Quote:
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Originally Posted by ghrocketman
Those fins look FAR too large for a scale model.
I prefer the MUCH smaller scale fins of the original K-36.
Use more nose weight and MORE (29mm pro-series) POWER.
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They are enlarged to ensure aerodynamic stability (the original 1969 Estes [and Centuri too, I think] Saturn V kit had true-to-scale fins). Our "YORF resident" 3D printing establishments could make after-market true-scale fins for the new Estes Saturn V kit. Although adding ballast up front would make it fly straight with the true-scale fins (and the higher-impulse recommended engines could easily loft the extra mass), utilizing M. Dean Black's exhaust-augmented finless rocket stability techniques (see: http://www.oldrocketforum.com/showt...ghlight=finless ) would enable such a Saturn V model to fly stably with true-scale fins and no ballast (plus, it could produce a wider, more scale-like exhaust trail, depending on the motor mount arrangement). |