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Old 21-02-2018, 09:56   #76
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Re: Boat Speed Variation between tacks

There was another similar thread about the speed difference on opposite tacks with a mono a year or so back.

It turned out to be the usually thing.........the difference in tide, waves, wind angle etc

The rig was good btw.
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Old 21-02-2018, 14:03   #77
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Re: Boat Speed Variation between tacks

Quote:
Originally Posted by Naughty Cat View Post
Fxykty. Thank you. I am not discounting anything but similarly I will work my way down the list of causes. Weight will be last only because Catanas are know for taking a load well and I hope the wine that forced its way on board hasn't made that much difference!

How do you check the alignment of a paddlewheel. Mine slots into a sleeve with a watertight screw top - fairly standard I think. As I recall the sleeve has guides which dictate the obwrall alignment of the wheel and depth unit. Is this something you need to do hauled out or are you refering to changing the alignment of the wheel itself within its removable housing?

My paddlewheel is in an Airmar unit and the entire housing can be rotated in place just by loosening the lock nut - it helpfully shows a centreline on its top, but of course the trick is guesstimating the boat’s centreline.

The entire unit can be removed and a provided blank housing can replace it - there’s a spray of water but not at high pressure so no worries about doing this in the water. I take it out whenever I expect to leave the boat for more than a week. YMMV
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Old 21-02-2018, 21:09   #78
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Re: Boat Speed Variation between tacks

Quote:
Originally Posted by Naughty Cat View Post
Fxykty. Thank you. I am not discounting anything but similarly I will work my way down the list of causes. Weight will be last only because Catanas are know for taking a load well and I hope the wine that forced its way on board hasn't made that much difference!

How do you check the alignment of a paddlewheel. Mine slots into a sleeve with a watertight screw top - fairly standard I think. As I recall the sleeve has guides which dictate the obwrall alignment of the wheel and depth unit. Is this something you need to do hauled out or are you refering to changing the alignment of the wheel itself within its removable housing?
Lift the impeller unit a little until you are able to rotate it. Rotate until the arrow on the top points forward. Push down and lock with the lid.
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