!lightbulb!

[lilmandavis]

here i go thinkin again, lol. im taking inventory on all my junk and a pile of stuff popped out.. i have two 36 and one 48 volt motor and all the stuff to make them go. thier from industrial electric vehicles. has anyone heard of this before in a boat. how many watts would it take a gen set to keep up with a pair of them? what if one had a geared down outdrive? if you could vent battery gas, maybe have a few of them? i know pontoons from back home had 36 volt outboards. but no gen set. these motors are 9 hp motors. the danger im now concerned about is the explosive batt gas from charging off the generator? that would be the ultimate fishing sneaker upper? just for a cruising boat nothing go fast!

 

[Bob_VT]

Re: !lightbulb!

Somewhere on the net (sorry I don't remember where) there was a person using old lower units from small outboards and mounting electic motors on top of them. I would suspect that once you cross the high voltage point there would be a trade off between weight and power. As for explosive gas (it is corrosive gas too) I would vent out with plastic tubing ... the good size stuff.

 

[lilmandavis]

Re: !lightbulb!

i was thinkin more of finding out how many watts one of these motors uses. to find out how big a generator it would need. im interested in coupling one to a small outdrive

 

[Always Broke]

Re: !lightbulb!

There is a large company (Iboats gets ticked off at the mention of competitors, think of the motor on your lawn mower that builds an electric outboard. It’s 3 HP, which equals about 150 LBS of thrust. You may want to find out the specs on it so it will give you a clue as to what you have and how much it would take to run them. With 4 batteries, using 48 volts it will troll for 8 hours and cruise for 2. With a 9 HP motor you better get your AMPS ready. You may be better off buying two of the ready built ones and a small generator? I foresee a weight and performance problem. You may want to start looking through the “Electric, Electronic and Trolling Motors” part of the forum, I saw a lot of ideas in there.

 

[Indymike]

Re: !lightbulb!

746 watts = 1hp.

746x9= 6714 watts

or 6.7 kw

 

[Mark42]

Re: !lightbulb!

This guy went to great lengths to make an electric outboard using a Briggs and Stratton electric motor, before even B&S thought about it! LOL!

http://www.psnw.com/~jmrudholm/etekoutboard2.html

I think this guy does some neat stuff in general. His website is worth browsing....

http://psnw.com/~jmrudholm/

Cut and paste the full url's into a new browser window to make them work right.

 

[lilmandavis]

Re: !lightbulb!

double post

 

[lilmandavis]

Re: !lightbulb!

so effectively, a 10000 watt gen set coupled with a capaciter and contollers and the right pot switch. a decent size boat could probably go pretty good. considering the rpms of these motors are up in the high 6's. yall might think compared to a gas engine, electric motors are torqy. especially these babies!! fuel for a 4 cylinder diesel gen would be alot more fuel efficient right? now all i have to do is figure out the duty cycles compared to load ratio's.

 

[Bondo]

Re: !lightbulb!

Freight Trains are powered by Electric Motors,.... As are most Ships......