Pearson Boats - Common Systems > Engine and Drive Train

Are all Pearson design 323 shafts/strut off to starboard ?

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Eibeltje:
Are all Pearson 323 shaft or strut off to starboard ?
 I ask. because nobody seems to have a steering problem only me.
We have a shaft off to starboard and with a left hand rotating prop our boat was steering strait,you could take your hands off the wheel and it won't very the course except for wind and current changes.Now we have a right handed prop and the boat pulls to starboard.
I like to hear from P323 owners with clockwise (RH) and anti clockwise propeller(LH) how there steering behavior is under engine power.
 

Dolce_Vita:

--- Quote from: Eibeltje on November 16, 2013, 10:09:37 PM ---Are all Pearson 323 shaft or strut off to starboard ?
 I ask. because nobody seems to have a steering problem only me.
We have a shaft off to starboard and with a left hand rotating prop our boat was steering strait,you could take your hands off the wheel and it won't very the course except for wind and current changes.Now we have a right handed prop and the boat pulls to starboard.
I like to hear from P323 owners with clockwise (RH) and anti clockwise propeller(LH) how there steering behavior is under engine power.

--- End quote ---

As you can see from the attached image, our shaft is offset to port.
We have an Atomic-4 Gasoline engine.  All atomic-4s  use RH rotation.
We have no pull to either side, in forward, but TERRIBLE prop-walk to Port in reverse,
made worse by the fact that we have a 3-blade prop.

I believe all the diesel engines used on the P-323 use LH rotation, and
experience prop-walk to starboard when in reverse.  I don't know about
their shaft offset, but I would assume it would be to starboard.

selene:
I can't tell you where my shaft is offset, but I can tell you that I have a diesel, and a strong walk to stbd in reverse. The prop is left-handed.

I have no issues going forward - she tracks well under power and under sail (when the sails are balanced), with very slight weatherhelm.

Eibeltje:
Thank you so much to take the time to respond to my nightmare .
Well,this is very new to me ! This explains why some boats don't have any problems with replacing there Atomic 4 engine with whatever is available because all transmissions for V drive are nowadays  clockwise and your shaft is off to port.But you will run in big problems if you want to replace a Volvo transmission with the shaft off to starboard .I have not found any transmission- V-drive with  LH rotation.I assume that SERENE has a Volvo MD 11 ,like ours. Have you found any transmissions which would support a LH prop rotation ?

selene:
Selene has a Westerbeke 30B three cylinder 27hp engine, with a Hurth ZF V drive model ZF15MIV V-drive transmission.

The Westerbeke has clockwise rotation (when viewed from the front), like the Volvo (AFAIK).

Very mysterious.  Are you sure the shaft is offset to Starboard?  Could there be some other cause, something to do with rudder itself, or the steering setup?  I only ask as it seems unlikely that Pearson would have changed the hull mould. What hull number are you (I am 212)?

How many blades do you have on the prop? As I understand it 2-blade props have worse propwalk than 3-blade.

I wonder...is the prop shaft offset moulded into the hull, or is is controlled by the seal, prop shaft strut and engine mountings?

I have heard that some people improve their propwalk by using the max-prop (and yet others disagree); also there is a propeller tuning company around here has a process whereby they cut the tips off the prop, and reattach the tips at right angles to their original position.  They claim huge improvement of propwalk. Who knows if it works? http://www.rtkprop.com/

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