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Old 08-18-2005 | 10:31 AM
  #7  
britbrat
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From: Deep River, ON, CANADA
Default RE: prop size for 40 uproar

A 10-5 APC would be fine (~15,300 rpm). A 10-6 will also do the job (~14,900 rpm). MAS props will flatten out at the revs that your engine is going to spin.

If you are concerned by the high rpm, remember that the torque peak on this engine is @ 13,600 rpm & the power peak is @ 16,000, so you want your revs to fall somewhere in between those two points.