T-Pain Is On A Boat: Re: [Electric Boats] Scooter Motor

Tuesday, April 3, 2012

Re: [Electric Boats] Scooter Motor

Or you go to http://www.evdrives.com/motenergy_me0907.html and get it for $395 instead of $500 at Thunderstruck but it's still made in China.

The Germans make some top of the line stuff but they're proud of it and I really liked the Agni motors too but again, the cost comes into play. My D&D shunt motor system was almost half the cost of a PM motor setup with comparative performance specs. Also, the controller was cheaper, more versital, and the software to tweek it was free.

I took the hit in efficiency, (80%ish vs 90%ish)and chose the old school shunt motor for my project in big part because it was made in America but primarily when I looked at the lower cost options, I figured the golf cart technology was a little more proven because it has a long history of taking a licking and keeping on ticking. Admittedly, if I had the budget I probably would have upgraded to a more cutting edge system but I'm skeptical of Chinese made hardware with extremely low price points. Maybe it will stand the test of time but you're rolling the dice. D&D seemed like a good bet and I like to buy American whenever I can.

That's why I'll spend more to buy tools at Sears instead of Harbor Frieght. You get what you pay for.

From: Myles Twete <matwete@comcast.net>
To: electricboats@yahoogroups.com
Sent: Tuesday, April 3, 2012 12:37 AM
Subject: RE: [Electric Boats] Scooter Motor

Sure, you could do that.

Or you could spend less than that and get a 6-8HP 36-48v DC permanent magnet motor that is more efficient than a series or shunt golf cart motor.

And much smaller and lighter and possibly even cheaper than your golf cart motor…

http://www.thunderstruck-ev.com/motors.html

http://www.thunderstruck-ev.com/motenergy-brushless-pmac-me0907.html

-mt

From: electricboats@yahoogroups.com [mailto:electricboats@yahoogroups.com] On Behalf Of Howard & Ann
Sent: Monday, April 02, 2012 4:15 PM
To: electricboats@yahoogroups.com
Subject: Re: [Electric Boats] Scooter Motor

Hi all

I would like to try a golf cart motor.

The 48 v high torgue kicks out 5 hp and it is under $600.00

Anyones thoughts ??

Howard

--- On Sun, 4/1/12, Arby bernt <arbybernt@yahoo.com> wrote:

From: Arby bernt <arbybernt@yahoo.com>
Subject: Re: [Electric Boats] Scooter Motor
To: "electricboats@yahoogroups.com" <electricboats@yahoogroups.com>
Received: Sunday, April 1, 2012, 3:49 PM

500 watts, peak (350 continuous?), before reduction will be about as effective as an oar. I got schooled on 2kw in about the same size boat (Thanks Myles and Scott), so you might consider holding off until you get hold of a little more power. 5kw seems to work at the 80% functional point. If you do choose to stick with your motor, invest in thermal monitoring with a probe in your motor.

Or do it anyway. Nothing like a little experience. Run your motor at no load and measure the shaft speed. Hooked up on you boat, tune your reduction so the motor can hit about 70 to 80% of the no load speed. This will maximize your power output. Most people under-speed their motors, resulting in high thermal loads, increased brush wear, and under-performance. A well lubed chain drive is noisy but easy to tune. Once you have the ratio, order a HTD timing belt and pulleys from Small Parts/Stock Drive Components or Grainger. Use a 1/2 belt to reduce parasitic losses, but understand a larger motor will require a bigger belt. A pair of deep-cycle group 31 batteries from Kmart and two 12v chargers or solar panels, and you're good to go. And snap a few pictures along the way too,

Arby
Advanced Marine Electric Propulsion

From: artworxz <no_reply@yahoogroups.com>
To: electricboats@yahoogroups.com
Sent: Sunday, April 1, 2012 7:26 AM
Subject: [Electric Boats] Scooter Motor

I'm new here, and would greatly appreciate any help anyone can give me. I recently purchased a 27' Sailboat, that had the Inborad missing. Has the shaft waiting for whatever. I have a 24 volt 500 watt Scooter Motor, thats been sitting around for a couple of years, and was wondering if I could hook this up to my shaft, and use it only for getting out of the Marina, and returning into my slip. Not looking at performance. If this is possible, could anyone tell me what I would require to make this setup. Just looking for a basic simple way to turn the prop.
Thanks