At 05:57 PM 5/28/2005, you wrote: >Does anybody know if ground effect lowers your stall speed? I would think >so, at least some small amount, but I don't know for sure. If so, how much?
Technically speaking, the stall speed decreases asymptotically to zero the closer you get to the ground but you will never see that in a practical case. The coefficient of lift does not continue to increase at the same rate and positive sink rate means you eventually come down. In the practical case, the stall speed will be as much as 1/2 the normal stall. That is one reason that you can lift off so far behind the power curve and not be able to climb out. Don Reid - donreid "at" peoplepc.com Bumpass, Va Visit my web sites at: AeroFoil, a 2-D Airfoil Design And Analysis Computer Program: http://aerofoilengineering.com KR2XL construction: http://aerofoilengineering.com/KR/KR2XL.htm Aviation Surplus: http://aerofoilengineering.com/PartsListing/Airparts.htm EAA Chapter 231: http://eaa231.org Ultralights: http://usua250.org VA EAA State Fly-in: http://vaeaa.org
