Shawn,
Just went outside to look at Fireball's prop /shaft. She is close to
the original arrangement that came from the factory with the Atomic (now
rebuilt 2x). She has newer replacement Martec 2 bladed folding prop
that is 1 5/8" aft of the strut with a radius that meets the recommended
hull clearance to keep vibration to a minimum. I agree with Gary that
that much unsupported shaft is a good way to get vibration. The shaft
on Fireball was replaced because the prop tip was 1/8" out of alignment
due to a line getting wrapped around the shaft/prop causing vibration.
Was amazed that so little shaft aft the strut could be bent.
Don Kern
Fireball 12708
Bristol RI
On 4/12/2019 12:03 AM, Shawn Wright via CnC-List wrote:
I just noticed what appears to be a fairly long extension of the prop
shaft beyond the support on the 35-2 pictured here:
http://www.cruisersforum.com/forums/attachment.php?attachmentid=168876&d=1524980874
It looks like there is at least 12" of shaft beyond the support before
the prop, and bit less between the hull and the support. I recall
reading a survey on a boat I was considering where the surveyor
commented on excessive prop shaft extension as a possible cause of
vibration. As this boat has a VW diesel (not sure of the
transmission), I am wondered if the shaft might be too long.
How does this compare with other 35s?
--
Shawn Wright
shawngwri...@gmail.com <mailto:shawngwri...@gmail.com>
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