Having friends with RV's (mostly 8's), the discussion comes up about propeller design, and the efficiency in certain rpm settings.
A former prop engineer for a major company has stated that they always designed the props for best efficiency in cruise at 750 fpm tip speed. This would be close to Mach .65.
What is your experience in the RV world with various propellers? Is the .65 tip speed pure BS, or is it a real world number for most efficient cruise?
Yes, there are many factors involved, but just trying to simplify the subject so I can wrap my brain around it!
A former prop engineer for a major company has stated that they always designed the props for best efficiency in cruise at 750 fpm tip speed. This would be close to Mach .65.
What is your experience in the RV world with various propellers? Is the .65 tip speed pure BS, or is it a real world number for most efficient cruise?
Yes, there are many factors involved, but just trying to simplify the subject so I can wrap my brain around it!