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Bruce has the 3D Pro Max spec'ed at 16800 RPM max and the 11 tooth pinion puts me at about 13770 (8.1 ratio), assuming a median 1700 head speed. That should, give or take, put me right in the engine's power band. Will keep you all posted on how it works out. I forgot to mention that I am also upgrading the Intrepid to the heavier EB gearbox as well, but keeping my standard boom length (really don't have any reason or desire to run the 810mm blades....will save them for my turbine). I am anxious to see how this combination works out.
"There are those who have...and, those who will" IRCHA #2117, AMA #70068, Turbine Waiver #105