Hi Shawn,
I suggest you don't do any improvements to the
prop or shaft right now. Use her for a year and see how it performs.
Sure, the blade tip clearance looks too small
(should be 15% of diameter) and the overhang
looks enormous but why not wait & see?
Moving the strut back is no small deal and
requires a new (longer) strut or an ugly hull buildup at mounting location.
Nice to have the 2.5:1 tranny. That could easily
swing a 16 X 16 prop with the old Pathfinder
diesel... given enough room of course. The
Campbell Sailor is an excellent choice for a
cruising boat and your size will be able to put
something like 25 - 30 HP into the water if you need to.
For prop porn try:
http://www.kiwiprops.co.nz/cms/index.php
I chose one of these for Sweet in considering
sailing performance AND tip clearance
considerations. The tips are so far back on the
hub that I could swing a 15 1/2" prop with the normal space abaft the strut.
Cheers, Russ
Hey! Why aren't you under the boat all dirty and
grimy on this Saturday morning?
At 09:17 AM 5/4/2019, you wrote:
I'm posting this for reference, in case it isÂ
helpful to anyone. The prop on our new 35-2 is a
Campbell Sailor 3 blade, marked 14 1/2 RH P16,
on a 1" shaft. It is driven by a 40hp VW diesel,
through a Hurth 100 2.5:1 transmission. The
engine does not have a tach, but I plan on
adding one so I can see how things compare with engine speed vs: boat speed.Â
While the shaft overhang is quite long at about
12" beyond the cutlass bearing and strut, a
surveyor looked at it and said he'd seen quite a
few done this way, and didn't feel it was an
issue, and the shaft was true. Of course, if I
snag a line, I am more likely to bend something,
so I will exercise care. My only options to
reduce the overhang are moving to a long strut
closer to the prop, or installing a smaller prop
and shortening the shaft. I'm at a 16 pitch now,
so I don't know if a smaller prop with a steeper
pitch will work. I'll investigate that if the
current setup starts to cause issues.
--
Shawn Wright
<mailto:shawngwri...@gmail.com>shawngwri...@gmail.com
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