Thread: Question 72" corsair .. @12 lbs
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Old Jan 29, 2013, 11:49 AM
Chad Veich is offline
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Scale Builder
United States, AZ, Litchfield Park
Joined Jul 2002
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I scaled the Royal Corsair plans up to 72 inches span and the CG comes out to be 4.5 inches back from the leading edge at the wing root so the 4.97 number you arrived at is probably pretty close. I'm not sure what percentage of total area you are trying to arrive at but I generally shoot for around 27-28% for test flights on my new warbirds. Better to err on the side of nose heavy for test flying of course. Just keep in mind that whatever measurement you decide on it needs to be obtained with the fuel tank empty and the gear retracted, assuming you have retracts. Twelve pounds on a 72 inch span Corsair is very light and as long as it's built straight and true it should fly very well and slow down nicely for landing. I've never measured the true landing speeds of any of my airplanes so can't comment on the 28-30 mph stall speed other than to say it sounds plausible.
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