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In a message dated 2/25/2004 3:03:07 PM Eastern Standard Time, [EMAIL PROTECTED] writes: << it appears that my prop, a 1B90CM 7351, is ok on 85 hp with a maximum rpm of not above 2600. >> You didn't read the whole thing! ;~) Go down to page 5 and you'll see the specific engine/prop combination limits. As far as cutting the length down to allow the engine to spin up faster, that's a benificial side effect, but not the real issue. Absent vibration and regulatory issues, alternatively you could pitch the prop finer and accomplish the same thing. The main reason to change the length is to eliminate potentially damaging resonances in the prop/crankshaft assembly. John ========================================================================== ==== To leave this forum go to: http://ercoupers.com/lists.htm Search the archives on http://escribe.com/aviation/coupers-tech/
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