How to move a boat sideways

RIN said:
Noooooo! Maybe it does depend on the boat but there is no way my twin shaft driven boat will go sideways unless there is no wind. Nudging starboard forward alternating with port in reverse with the wheel centered is not enough to bring the stern to starboard and get in to our alongside berth.

It was possible with my old twin engined stern drive boat as vectored thrusts give you greater control over the movement of your boat, especially onto the wind.
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I'm not sure we are disagreeing, actually.
My generic reasoning about shaft boats being more maneuverable than outdrive boats was in reply to the suggestion of keeping the wheel centered.
You are now saying that your outdrives boat gave you greater control using the wheel, which stands to reason.
But if she was also better than your shafts boat at maneuvering with the wheel centered, that would be unheard before, for me.
 
MapisM said:
I'm not sure we are disagreeing, actually.
My generic reasoning about shaft boats being more maneuverable than outdrive boats was in reply to the suggestion of keeping the wheel centered.
You are now saying that your outdrives boat gave you greater control using the wheel, which stands to reason.
But if she was also better than your shafts boat at maneuvering with the wheel centered, that would be unheard before, for me.
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No it wasn't as good with the wheel centered. I think that is because the props seem to be closer together than with shafts so you get less turning force with outdrives when using the engines in opposition.

On the other hand you really can't use the wheel as well on shafts as when you engage astern there is no water really flowing over the rudder and you will get no rudder assisted turn which is why I think most shaft owners do not bother with the wheel. i.e. with the wheel fully over to port and the port engine engaged, the bows turn to port and the stern stays where it is which is exactly what it would do if the helm was centered or even fully to starboard.
 
RIN said:
No it wasn't as good with the wheel centered. I think that is because the props seem to be closer together than with shafts so you get less turning force with outdrives when using the engines in opposition.
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I suspect that it is mainly because the props on shafts are larger than on outdrives and that the larger prop provides a greater propwalk than smaller props.
Isn't the prop speed is also slower on shafts when manoeuvring thus being less efficient at forward thrust thus giving a greater propwalk.
 
Hurricane said:
I suspect that it is mainly because the props on shafts are larger than on outdrives and that the larger prop provides a greater propwalk than smaller props.
Isn't the prop speed is also slower on shafts when manoeuvring thus being less efficient at forward thrust thus giving a greater propwalk.
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I am not sure why the usual pessimists are not commenting in amazement that the outdrives lasted the length of the video without corroding/exploding/sinking the boat/bankrupting the presenter etc etc !!
 
gjgm said:
I suspect that it is mainly because the props on shafts are larger than on outdrives and that the larger prop provides a greater propwalk than smaller props.
Isn't the prop speed is also slower on shafts when manoeuvring thus being less efficient at forward thrust thus giving a greater propwalk.
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duoprops also cancel out prop walk.
9"]
I am not sure why the usual pessimists are not commenting in amazement that the outdrives lasted the length of the video without corroding/exploding/sinking the boat/bankrupting the presenter etc etc !
 
The secret of all maneuvering with any outdrive boat is steer then gear. Unlike shafts which is no steer just gear.

This is a good start
 
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