Thread: Visible airscrew disc
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  #9  
Old 09-09-2012, 02:04 PM
Al Schlageter Al Schlageter is offline
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3000rpm @ 0.477 = 1431rpm
3000rpm @ 0.42 = 1260rpm

Merlin X, XX, and 61 used 0.42 reduction ratio. All other double digit Merlins used 0.477 reduction ratio.
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