The Ford Barn - View Single Post - The Terry Burtz 5 main bearing engine blocks are back on track.

Terry Burtz, Calif · 05-29-2020, 08:07 PM

40 Delux

Pietenpol's were all homebuilt and likely used a 2 blade homemade propeller. What is scary is that one blade likely grabbed more air than the other blade which resulted in high bending loads on the 1.625-inch diameter main bearing.

Early Funk airplanes used a dry-sump inverted Model B Ford engine and these airplanes were factory-built and benefited from the larger 2-inch main bearing. The propellers on Funks likely had less miss-match between the 2 blades.

05-29-2020, 08:07 PM	#98
Terry Burtz, Calif Senior Member Join Date: May 2010 Location: Campbell,CA, USA Posts: 318	Re: The Terry Burtz 5 main bearing engine blocks are back on track. 40 Delux Pietenpol's were all homebuilt and likely used a 2 blade homemade propeller. What is scary is that one blade likely grabbed more air than the other blade which resulted in high bending loads on the 1.625-inch diameter main bearing. Early Funk airplanes used a dry-sump inverted Model B Ford engine and these airplanes were factory-built and benefited from the larger 2-inch main bearing. The propellers on Funks likely had less miss-match between the 2 blades.