OTOH, a fast rotating beach umbrella or parasol or
a very large mushroom, might do it. :-)
Along with Rick Monteverde's suggestion that a Frisbee's spin effectslift, I propose a lightweight, inflatable "dish" or hemisphere about 8 feetin diameter as a do-it-yourself flying "saucer".If you kept one of those 1950s Hoola Hoops, some strap webbinggoing to a hub in the center will keep the inflated dome-shaped plasticfilm flat on the bottom and provide a place to attach the drive shaftpowered by the gas engine from a weed whacker.The NASA simulator gives the lift for a rotating cylinder with means forvarying the diameter, length and rpm vs air speed etc., which should give a figure forlift on the dish based on the Coanda Effect.FJSA Lucid explanation of the Coanda Effect:NASA Flight Simulator:Input: Shape/AngleAirfoil Shape: airfoil, ellipse; plate, cylinder, ballSize: Spin Rpm (+/-), Radius Ft, Span ft,Flight Test. -720 rpm 5 ft long x 8 inch dia in 60 mph wind ~ -45 lbs lift.
