I always say to exaggerate the problem when in doubt.
So take a small paddle(like a kid spanking paddle) and move it as fast as you can through water . . . then take a huge paddle and try to move it as fast as you can through water.
It will be slower. Basically it will take a lot more power to move it the same speed.
On Fri, Mar 30, 2012 at 5:44 PM, Kirk McLoren <kirkmcloren@yahoo.com> wrote:
... How beautiful it is to do nothing, then rest afterwardsSent: Friday, March 30, 2012 2:04 PM
Subject: [Electric Boats] Re: Electric Sternwheeler
I hope you are right. I would be a shoal water propulsion system, and I was hoping for something a little more scientific!
--- In electricboats@yahoogroups.com, Kirk McLoren <kirkmcloren@...> wrote:
>
>
> bet you a dollar to a doughnut there is more thrust
>
> ... How beautiful it is to do nothing, then rest afterwards
> Â Â Â Â
>
>
> ________________________________
> From: danbollinger <no_reply@yahoogroups.com>
> To: electricboats@yahoogroups.com
> Sent: Friday, March 30, 2012 1:30 PM
> Subject: [Electric Boats] Re: Electric Sternwheeler
>
>
>
> Â
>
> Someone correct me if I'm wrong. I thought that drag propulsion is a function of the paddle's immersed float area. Adding more floats (paddles) inline does not change that area (viewed from the stern), therefore, there is no additional thrust.
>
> --- In electricboats@yahoogroups.com, George Field <fieldg63@> wrote:
> >
> > Howabout, instead of a paddle wheel you make a paddle track! Like a tank ttack or a snowmobile belt with paddles attached. Paddles would the travel the length of the boat between the pontoons and back under the deck. You have the option of making the paddles shorter ie not so deep and narrower than a paddle wheel. The paddles would be more efficient as they would be at right angles to the water surface for the whole length of the hull instead of only at the bottom of the stroke on a paddle wheel.
> >
> > Just a thought!
> >
> > George
> >
> > Sent from my iPad
> >
> >
> >
> > On 2011-03-06, at 2:43 PM, "Mooncat" <mooncat_2005@> wrote:
> >
> > > I am planning a paddlewheel boat for use on British narrow canals. She will be 23'6" long (maximum to tow on a trailer behind a private car) 7' beam, with a catamaran hull so the the centre mounted wheel does not project below the bottom of the hull (draft 1',) but has a good flow of water to the wheel.
> > >
> > >
> >
>
__._,_.___
.
__,_._,___
No comments:
Post a Comment