I do have something more to mention that isn't touched upon in Busch's article. I came across a chart somewhere along the line that informed me that with my 52" diameter prop, 3100 RPM gave me a tip speed of around 80% of mach which is, if I recall the chart info correctly, the sweet spot for tip thrust vs drag . . . drag in this instance relating to tip vortices and their relationship to mach. I think I came across this chart while reading one of Paul Lipps' articles in Contact Magazine.
Also, I'm using 3100 RPM as a constant when in fact my Sterba 52 x 56 at WOT above 7.5 gives me a range that goes from 3100 to 3200. RPM is usually somewhere in between those two figures. *********** I wonder why my last post didn't show up in my daily digest . . . also wonder why Brian Kraut's postings are often blank. Mike Stirewalt KSEE ____________________________________________________________ Do THIS before eating carbs (every time) 1 EASY tip to increase fat-burning, lower blood sugar & decrease fat storage http://thirdpartyoffers.juno.com/TGL3141/52e6aba6deb062ba66b76st01vuc
