Mark, and fellow neters, Have you thought of fixing all your prop and horsepower problems with a gear reduction unit. A very good friend of mine, Ron Slender, of http://www.vw-engines.com/ Australia is currently building a reduction to suit your Corvairs, I'm sure he would be happy to discuss this with anyone that was interested.
You can see a similar unit he has made and is available to suit your VW's This unit is now flying in his own design two seat all aluminium home built aircraft, called the TYPHOON This aircraft is about ?? $40,000 Aust $22,000 US with and engine.( depending on currant exchange rate) Check them out at the following sites, both are linked together. http://www.vw-engines.com/ www.homebuilt-aviation.com/ Phil Matheson mathe...@dodo.com.au VH-PKR ( reserved) Phil's KR See our VW Engines and Home built web page at http://www.vw-engines.com/ www.homebuilt-aviation.com/