68x74 is what my notes say. Basically the same as Tracy's original prop.

Finn


Al Gietzen wrote:

 

2.176:1 will definitely not windmill at pattern or glide speed for an RV-3 (about 100 mph). Might make a 1/3 turn and stop again if you point it down a bit. And that was with an engine that had rather low compression.
Tested several times over Clearwater Airpark.

Finn

Finn;

What prop diameter and pitch?

Al

 

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