There was a posting thread related to prop selection in this forum a short while back. Several of us had things to say about prop selection and for the most part, we got it right. I say that because some of us got one part right while others got other parts right. All in all, there was a pretty good amount of useful information on prop selection and, hopefully, prop selection became a tad bit easier for newer flyers.

Don Brooks who writes for the AMA Sport Aviator on-line magazine just released an article on, guess what... Prop Selection. The URL is http://www.masportaviator.com/ah.asp?CatID=2&ID=72

I am in the process of reading the article, but if it is like any other article Frank wrote, well, this could be considered 'gospel' among those of us that are 'believers'.

I intend to use it in my club training guide (with Frank's permission of course).

Very usefull stuff. That article was published several years ago, but I can't remember which magazine it was in. It is still entirely relevant.

Hi Brit.

Very useful indeed. One thing that I noticed was the engine operating RPM ranges used. The full-throttle engine RPM ranges were ub the 10,500 to 11,500 RPM. I refer to another thread where people were mentioning 15000 RPM and so forth. The range used in the article (10,500 to 11,500) are the torque ranges of most engines and the usefull RPM ranges for most engines. Those people that are operating at higher RPM ranges are confusing high noise levels for power and thrust.

True enough.

Basically true, and certainly so about the "sport" type engines 95% of us run. There are some engines designed specifically for racing that run 15,00 to 25,000 rpm quite happily however.

Running most of our engines at 15K will only result in less applicable power and a much shorter life.
Dennis-