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I have a 20″ Maxprop, which did improve reverse and used to feather under sail. Now with the Velvet Drive it takes a long time before the prop shaft stops rotating under sail. PYI can give you the recommended pitch setting for your engine and displacement. Then it may need to be adjusted after a sea trial. There is one version of the MaxProp that can be adjusted in the water, otherwise it is a short haul.
John
On Fri, Jun 26, 2009 at 12:48 PM, quent < ([email][/email])> wrote:
One and one half inches in diameter. Left hand rotation. I have no experience with Max-prop. We have a fixed prop 18″ diameter, 12″ pitch, three blade that seems to work well with the W-58.
Quent—
Regards,
John Stevenson
http://www.svsarah.comPost generated from Pearson424 Forum using Mail2Forum
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When setting the pitch, be sure to consider if you will be mostly in
salt water or in brackish water. PYI will advise you.John Stevenson wrote:
I have a 20″ Maxprop, which did improve reverse and used to feather
under sail. Now with the Velvet Drive it takes a long time before the
prop shaft stops rotating under sail. PYI can give you the
recommended pitch setting for your engine and displacement. Then it
may need to be adjusted after a sea trial. There is one version of
the MaxProp that can be adjusted in the water, otherwise it is a short
haul.John
On Fri, Jun 26, 2009 at 12:48 PM, quent <
One and one half inches in diameter. Left hand rotation. I have no
experience with Max-prop. We have a fixed prop 18″ diameter, 12″
pitch, three blade that seems to work well with the W-58.
Quent—
Regards,
John Stevenson
http://www.svsarah.com <http://www.svsarah.com>
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FYI for all who are looking for a new fixed prop. I’ve found a place that manufactures them: West by North Enterprises (604.506.2032). They produce the Campbell Sailor propeller, a 3 blade LH, 17″ diameter, 10″ pitch for a 1.5″ shaft. They state that this size is recommended to have good cruising rpm and still have reserve for head wind and seas. Price $680 + shipping. They state that it has been successfully used on other 424’s with a 58 Westie.
I will be replacing a LH 18″ dia, 12″ pitch for a 1.5″ shaft which the PO let dissolve.
Dan Kalinowski
Lady Leanne II (#135)
Honolulu -
A 17-10 will run at higher rpms for the same speed than an 18-12. Moreover, the fuel usage curve for the w58 shows using nearly double the fuel at 2200 rpm as it does at 1900 rpm. I do not subscribe to the school that a diesel has to be run at 80% of max rpm to last. A diesel has to run loaded but is perfectly capable of running at a lower speed for extended periods of time. Look at 1800 rpm gensets. Whenever you have spinning and reciprocating machinery combined the faster the spin the more energy is wasted in inertia of pistons. I run my w58 perfectly happily at 1800-2000 rpm and burn 1 gal or less per hour. At 2200, it's 2 gal or more.
But that's just my humble opinion.
Bob
On Mon, Jun 29, 2009 at 4:07 PM, kalinowski < ([email][/email])> wrote:
FYI for all who are looking for a new fixed prop. I've found a place that manufactures them: West by North Enterprises (604.506.2032). They produce the Campbell Sailor propeller, a 3 blade LH, 17″ diameter, 10″ pitch for a 1.5″ shaft. They state that this size is recommended to have good cruising rpm and still have reserve for head wind and seas. Price $680 + shipping. They state that it has been successfully used on other 424's with a 58 Westie.
I will be replacing a LH 18″ dia, 12″ pitch for a 1.5″ shaft which the PO let dissolve.
Dan Kalinowski
Lady Leanne II (#135)
Honolulu—
Bob Fine
s/v Pelican
Hull #8Post generated from Pearson424 Forum using Mail2Forum
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If you have a Westerbeke 58, you most likely have a direct drive Warner Velvet drive transmission and a Walter 2:1 reduction RV-20 V-drive.
A friend of ours has a Campbell prop on his Pearson 36-2, and is very happy with it.
However for a P-424, I can’t see how a prop smaller that the original Michigan Wheel 18 by 12 in size and also smaller in blade area would be optimal.
We went to Bahamas and back at about 1800 rpm, 6.5-7 knots, and the Westerbeke was very happy all the way. Our buddy boat, a Caliber 40 with a Yanmar, ran about 2600 rpm to pace us. Their fuel consumption was about the same as ours, about 0.8 gallon per hour.
At full throttle, the boat does about one knot faster, and consumes a lot more fuel. A considerable amount of that fuel ends up as soot on the
transom.
Quent
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