Monday, September 12, 2011

RE: [Electric Boats] 1000w per ton?

 

Watts per ton figures are a bit academic unless you use torque per ton which is far more relevant for slow speed projects.

 

However, the first stop is to establish how much thrust you wish to generate and the speed at which the boat will travel.

 

Once you have those figures you can make an informed guestimate about the motor which will run efficiently while providing the torque you need; to turn the prop at the rpms required to produce the desired thrust  

 

Then you can estimate what sort of battery bank capacity  you will require to run the time/distance you desire

 

Andrew Gilchrist

www.fastelectrics.com

612 4982 5481

Australia


From: electricboats@yahoogroups.com [mailto:electricboats@yahoogroups.com] On Behalf Of cptrdbrd
Sent: Tuesday, 13 September 2011 6:51 AM
To: electricboats@yahoogroups.com
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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