Does anyone have real-world, actual test data, for static thrust measurements from any sort of VW aero engines? I hear a lot of banter about what engines can do, but no one seems to have done a simple static thrust test of their engine/prop combination.I would love to get some real measurements of rpm/prop settings to get an idea of what the VW's can actually do. BTW, the only info I've found so far is from Great Plains, in reference to the redrive that the provide from VE. The Reduction Drive Engines have really opened up the range of aircraft that can use VW power. Direct drive VW's are limited to a 62" diameter prop because of tip speed. They will produce about 200 to 250 lbs. of thrust, depending upon prop manufacturer. The reduction drive engines can turn prop diameters from 72" with a 1.6:1 ratio and up to a 84" prop with a 2.0:1 ratio. Static thrust with a 72" prop is about 350 lbs. The 2:1 ratio with a 84" prop will deliver about 450 lbs. of thrust.