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Old 04-14-2007, 02:43 AM
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efish
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Default RE: Servos For A 3D Gas Plane

Was gonna put this in a separate post, but since there are a few pros on this thread already.....

How much AUW should a 26cc plane have for reasonable 3D performance? Put some numbers through a calculator and a 17 x 8 Menzs prop spinning at 7000 rpm puts out just under 12lbs of static thrust (with a air density of about 30mmHg). With smaller planes, I've always been told to try to shoot for a 1.5 power to weight ratio. I really don't think I can get my plane to have an AUW of 8lbs for a 1.5 power to weight ratio. Are my numbers off, or is a lower power to weight acceptable for 3ding with a gasser?

Planning to get the gasser up in about a month and half so I'm just starting to work through a long and growing list of queries and check points .....

Thanks.