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Prop walk is a function of 'tip clearance' to the hull and other hull
projections (aperture, etc.) , blade tip shape, , etc. etc. etc. Just learn to 'back and fill' to steer going in reverse when there is NO flow over the rudder ... and be prepared to use your rub-rails. Especially if this is a full keeled boat with an aperture, you will need LOTS of practice in 'backing and filling' to get it right; but, once you 'learn', you will not want less prop-walk. If you want to see exactly how to use prop-walk, go down to the commercial docks and watch the prop-walk wizards / watermen fishermen when they are about to land with a single screw boat -- always in a hurry, LOTS of 'rpm burst', and precise maneuvering ... and all without touching the wheel !!!!!. In article , Capt. JG wrote: Back to more questions somewhat related to the Perkins 4-108. This sailboat is a pig to back up. It really wants to prop walk to starboard. According to the owner, it's got a fixed, 3-blade prop. I believe the boat also has a folding prop aboard in a locker. Would that help? Would tuning help? What do you think? |
#2
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"Rich Hampel" wrote in message
... Prop walk is a function of 'tip clearance' to the hull and other hull projections (aperture, etc.) , blade tip shape, , etc. etc. etc. Just learn to 'back and fill' to steer going in reverse when there is NO flow over the rudder ... and be prepared to use your rub-rails. Especially if this is a full keeled boat with an aperture, you will need LOTS of practice in 'backing and filling' to get it right; but, once you 'learn', you will not want less prop-walk. If you want to see exactly how to use prop-walk, go down to the commercial docks and watch the prop-walk wizards / watermen fishermen when they are about to land with a single screw boat -- always in a hurry, LOTS of 'rpm burst', and precise maneuvering ... and all without touching the wheel !!!!!. In article , Capt. JG wrote: Back to more questions somewhat related to the Perkins 4-108. This sailboat is a pig to back up. It really wants to prop walk to starboard. According to the owner, it's got a fixed, 3-blade prop. I believe the boat also has a folding prop aboard in a locker. Would that help? Would tuning help? What do you think? Rich, as I mentionen in a previous response, I'm familiar with the technique. I was looking for a mechanical solution. Thanks though. -- "j" ganz @@ www.sailnow.com |
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