kramer714
10th June 2010, 02:47 AM
My kid put together his oddrock for LDRS, called flying fur. it is 2 long paint rollers for the body tubes, 6 small paint rollers for the tubefur fins, and half a tennis ball for the nosecone. 24mm mount and with chute and motor weighs in at 450 grams.
The kid designed it, when he asked me how to simulate it in rocsim, i drew a blank. Resorting to old school, we swing tested it. Funny thing, IT IS STABLE FORWARDS OR BACKWARDS! Once one end started pointing forward (nose OR tail) it stabalized and swung in a perfect arc.
I'm guessing that the VERY high drag of the furtube fins acts more like a plate creating base drag. This shoves the Cp aft regardless of what direction it is flying.
Despite the strange results since it was so stable I don't have a problem flying it, I do plan to use the shortest delay I can find! I'm thinking an E30 and a long rod.
The dog has the better fur, but poor ballistics
The kid designed it, when he asked me how to simulate it in rocsim, i drew a blank. Resorting to old school, we swing tested it. Funny thing, IT IS STABLE FORWARDS OR BACKWARDS! Once one end started pointing forward (nose OR tail) it stabalized and swung in a perfect arc.
I'm guessing that the VERY high drag of the furtube fins acts more like a plate creating base drag. This shoves the Cp aft regardless of what direction it is flying.
Despite the strange results since it was so stable I don't have a problem flying it, I do plan to use the shortest delay I can find! I'm thinking an E30 and a long rod.
The dog has the better fur, but poor ballistics