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Author Topic: Motor choice  (Read 3452 times)

Andy_k

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Motor choice
« on: October 12, 2011, 07:00:10 pm »
Hello fellow boaters  :D wel thats the nice stuff out of the way now to the nitty gritty part I am at present building a submarine that has a 5 bladed prop that is 5 3/4 " in diameter


now my original choice was to fit a 900 motor but have not used 1 before and I am wondering if it will be up to the job? to those of you who have 900 experience if not any suggestion as what to use
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andyn

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Re: Motor choice
« Reply #1 on: October 12, 2011, 08:26:46 pm »
A 900 on 2 or 3 to 1 gearbox will be perfect. I'd gofor 3:1 personally.

Andy :-)
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Andy_k

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Re: Motor choice
« Reply #2 on: October 13, 2011, 12:58:55 pm »
Cheers
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Shipmate60

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Re: Motor choice
« Reply #3 on: October 13, 2011, 01:14:18 pm »
Andy,
What voltage will you be running her on?

Bob
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Andy_k

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Re: Motor choice
« Reply #4 on: October 13, 2011, 04:08:29 pm »
12v bob more than likely lead acids
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Shipmate60

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Re: Motor choice
« Reply #5 on: October 13, 2011, 05:04:42 pm »
Andy,
If I remember correctly the MMB 900 runs at about 5000 rpm on 12 volts so obviously a 2:1 reduction will give 2500 rpm or a 3:1 will give 1666.66rec revs.

Bob
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andyn

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Re: Motor choice
« Reply #6 on: October 13, 2011, 05:09:18 pm »
6500 Bob, but close enough ;)

 I reckon it'd be perfect on a 3:1 pulley system :-)

Andy.
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Andy_k

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Re: Motor choice
« Reply #7 on: October 13, 2011, 05:52:49 pm »
Quote from: Andy - MMB on October 13, 2011, 05:09:18 pm
6500 Bob, but close enough ;)

 I reckon it'd be perfect on a 3:1 pulley system :-)

Andy.
I don't fancy a pulley system toothed belt on the other hand
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andyn

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Re: Motor choice
« Reply #8 on: October 13, 2011, 06:05:25 pm »
Oops... Thats what I meant :embarrassed:
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