>> ...with one blade set to higher pitch than the other. << Having recently re-assembled Calypso's MAX Prop (3 blade) I expect it is conceivable to have a blade out of position but that would likely be apparent when rotating the prop prior to launch. A blade out of position would also vibrate in reverse.
How long is your prop shaft? i.e. the length that is "whipping". Are your engine mounts original or over 10 years old? When we first purchased Calypso the engine mounts were a mix of 15 to 30+ years old. We replaced them and significantly reduced engine vibration, not sure of the change to prop shaft whipping. Martin Calypso 1971 C&C 43 Seattle From: CnC-List [mailto:[email protected]] On Behalf Of William Hall Sent: Thursday, January 09, 2014 10:33 AM To: cnc-list Subject: Re: Stus-List Vibration Yes, the prop looks great and feathers and unfeathers very smoothly and easily by hand. One thought that occurred to me is that the max prop might have been assembled incorrectly, with one blade set to higher pitch than the other. In the assembly process one has to match the gear on each blade to the correct tooth on the gear in the hub. But one would hope that they'd have gotten that right when they re-assembled after the prop was rebuilt. Anyway I plan to check blade pitch among other things.
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