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  1. #11
    Join Date
    Jun 2005
    Location
    South of Finland
    Posts
    224

    Default Re: Remote V drive alignment

    Quote Originally Posted by Bouba View Post
    Can you replace all the couplings with flexible ones, then alignment is not so critical
    Hi and tx for the comment.

    I thought about that at some point as well but now it seems that it will be relatively easy to move the engines and transmissions into position to eliminate the angular problems all together. Also all components including the shafts, u-joints and couplings are in good condition so no need to replace anything. Flexible couplings would nevertheless be a good solution but for this kind of remote v drive configuration new resonance calculations would be needed to ensure that the whole thing does not selfdestruct.

    To be fair towards Ferretti the engine - transmission alignment is mentioned in the manual as standard maintenance however the propshaft - fixed mounted transmssion should not need any adjustment after initial installation if done right.
    Last edited by baylabayla3288; 12-04-17 at 17:31.

  2. #12
    Join Date
    Jun 2005
    Location
    South of Finland
    Posts
    224

    Default Re: Remote V drive alignment

    Just to let you know Alexandra is in the back in the water and the first 40 nm are behind. The good news is that she is running very smooth now. The low frequency vibes that could be felt on the flybridge when accelerating is gone, this was probably due to the propshaft gear box missalignment. Also the boat is clearly smoother across the whole rev range which is probably achieved with all cardan angles being in spec now. Only the resonance sound from the left transmission at 800 - 900 rpms can still be heard albeit clearly muted. I beleive that this is more related to the characteristics of the remote v drives. This noise can only be heard inside the boat and with the transmission at operating temperature and in forward gear. As this is the port side transmission there is one more set of gears involved producing the left hand rotation, this could cause the different behaviour between port and starboard I think.

    Would be interesting to know if any of you out there who have the same remote V setup have experience any resonance noises at these lower rpms

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