At 04:10 PM 1/26/2005, you wrote: >Are there any rules of thumb of scientific formulas that would determine >the length that the exhaust tubes should extend below the belly of the >airplane.
If at all possible, the exhaust should not extend beyond the surface of the plane. Any protrusion will be a source of drag. 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
