Hello everyone, I am currently in the process of building a Madcow 4.0” Fiberglass Little John. It has a plastic nose cone with a fiberglass wrap on the inside (not sure if there is a actual nomenclature for that design) and a 10” long 54mm motor mount. The instructions state the “estimated” CP is at 36”. I have put together a simulation with OpenRocket to the best of my knowledge (I am certainly no expert with the program) and I am seeing a slight problem. According to O.R. the CP is at 34.508 in. and the CG is at 35.196 in.! When I add weight to the nose cone, in order to get the CP at least 4.0” behind the CG I have to add approximately 18 oz. of weight. To me that just seems a bit drastic so I figured I would put it out here and see if I can get some advice on what to do. I have attached the copy of what I have done with O.R. to this point. As of now the parachute is just a experimental size because I am not sure what size to use. Was told to wait until I get the rocket built and then we could figure it out, so I am just playing with ideas here when it comes to the chute. Christopher L. Coffee
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FG Little John.ork
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