Monday, September 12, 2011

Re: [Electric Boats] 1000w per ton?

 

Open, flat paddles are not efficient (losses pushing he water down and up along with wash around the edges). Making them 8 feet in diameter seems way out of line.
 
And your hull shape is not going to help. My wild guess is you might get 2 knots. Change the design to 4 feet by 20 feet and you might see that 4 knot speed.
 
 
 
Sent: Monday, September 12, 2011 10:09 PM
Subject: Re: [Electric Boats] 1000w per ton?
 
 

looking at 4x8 to 6 x 12 flat bottom with 45degre bow.  I belive the wheels are more efficent than a prop with less slip in the water.  I am thinking 6-8 12x12 paddels on 2-6' wheels.
thanks
   Paul
From: Ed Bachmann edbz <edbz@hotmail.com>
To: electricboats@yahoogroups.com
Sent: Monday, September 12, 2011 9:46 PM
Subject: Re: [Electric Boats] 1000w per ton?

 
How small is your "small side-wheeler" going to be? Length, width, displacement, Style (shape) of hull?
 
Displacement speed limitations are going to be the issue but the dynamics of a side-wheeler are going to be too complicated for anyone to predict the actual speed.
 
.
From: cptrdbrd
Sent: Monday, September 12, 2011 4:50 PM
Subject: [Electric Boats] 1000w per ton?
 
 
Hi all

I noticed a post earler that referd to a rule of thum "1000W per ton" does this aply to pattel wheelers to? I am thinking about building a SMALL 1 or 2 person side wheeler with 2 eletric wheel chair moters (500W each) and the gear boxes that are atached. Then reduce down with a 3-1 belt reduction.this will give me about 4-5 knots with a 5-6' wheel. I have the speed controll and the joy stick to controll it. Any input?
Paul


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