Thanks for that John!
Another aspect that I am much less sure about is the shaft elevation.
The engine I have would allow the shaft to be angled much nearer to the
horizontal than Atkin specified and that would be good for efficiency I
think (in theory at least). However, I wonder if the hull design relies on
an element of lift from the down angled prop to ultimately provide level
Atkin apparently always said "don't modify anything" and I am very happy
with that, but I am still curious..................
What do people think ??
Behalf Of John Kohnen
Sent: Monday, 17 March 2008 6:39 PM
Subject: Re: [AtkinBoats] Engine not aligned with Keel
Yep, you've got it figured out right, Alan. With a left-hand propeller
angle the front of the engine off to starboard.
On Tue, 11 Mar 2008 03:32:18 -0700, Alan B wrote:
> I'm currently lofting a set of "River Belle" plans and notice that the
> forward end of the engine centre line is angled laterally off to Port. I
> assume this has been done to offset "prop walk" effects.
> I have just acquired a suitable engine & gearbox which rotates
> anti-clockwise when viewed from astern and will therefore require a Left
> Hand propeller I think. Whilst no comment is made in the description of
> boat about propeller rotation or the engine offset, I'm assuming that
> will then require the offset of the engine centreline to be changed to
Never put off until tomorrow what you can do the day after
tomorrow. <Mark Twain>
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If you set out to build an Atkin boat, please do not modify the plans. If
you stray from the plans you do so at your own risk and Atkin & Co. will
take no responsibility for the performance of the resulting boat.
The current Atkin boat plans catalog is online at
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