----[Please read http://ercoupers.com/disclaimer.htm before following any advice in this forum.]----At 07:22 PM 8/3/2006, you wrote:
the article suggests running a bit flatter of a prop, more of a climb prop. Then, in cruise, you let it spin a bit higher rpm to get your cruise speed and, he asserts, youll be putting a lot less stress on your engine than if you used a cruise prop like the 7152 on a C-85.
The theory is correct. The issue as I see it is whether the effect is significant or not. Certificated aircraft engines are designed such that they can be operated at peak continuous power 100% of the time. whether there would be a measurable decrease in wear is questionable. there is an increase in fuel consumption, though, due to the increased friction associated with the higher RPMs.
My recommendation is to pick the prop that gives the climb performance you need and let the cruise chips fall where they may.
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