----- Original Message -----From: stefSent: Sunday, October 10, 2010 3:22 AMSubject: Re: [Electric Boats] Want to convert a glasstron 184 to electric. Any advice?okay, thanks for the advice.
I don't have 5G to spend, and want to do it as " cheap" as possible, since it's a hobby...I do have the batteries however, and i " need" to buy the electric motor.When i look at the locan craigslist-like selling sites, and the local boatshops, there are a lot of funny family boats for sale.What's reasonable in prive, are the 12-15 ft polyester boats, like the corsiva models.Also aluminum fishing boats and Jon's. All weighing 300-500 pounds. Water depth max. one foot.Are these boats (flat buttom, to light curved bottom) the hulls i would want?I rather have a nice electric inboars, but the alternative is an outboard, dump the engine, and make a nice Mars or Etek on it.Any ideas on plans like that?Where can i find more info, books, etc. instead of keeping asking Q's at you guys? :)Thanks for all the info and effort taken to answer all my newbee questions :)
Op 10 okt 2010, om 04:24 heeft dennis wolfe het volgende geschreven:
I wouldn't do it. A deep V hull is designed to go fast (with a lot of HP) and ride relatively smoothly over waves. Your boat has 165 hp and the engine, I/O and a full tank of gas weigh less than 1000#. It can probably run a couple of hours at wide open throttle, maybe 40 mph. The total boat weight is around 2000#.165 hp = 120 kW, this much power for 2 hours = 240 kWh. A 60# lead battery holds 1.3 kW and costs $100 to $250. For equal power you would need 185 of these batteries; over 5 tons and $20,000! This is why there are no practical electric speed boats.If you had around $5000 to spend on an electric drive system, including batteries, you would want a displacement hull, like a sail boat, around 18 to 24 feel long. You would be able to cruise around at 5-6 mph for 5-7 hours on a charge. If that is the kind of boating you want to do electric would be a good choice. There is no substitute for the magic of moving along in near silence but you pay a steep price in speed and range potential.Denny----- Original Message -----From: Stef Mob.Sent: Saturday, October 09, 2010 5:26 PMSubject: Re: [Electric Boats] Want to convert a glasstron 184 to electric. Any advice?So, in short words: don't do it?Is there a equation point? In other words: with a dc motor of xxx hp, it Will be great?Or do i just need to look for an other (type of) boat.I thought a V-hull would be great? ( as they make a speed boat of it...?)
How can i compare gas and electric motor power with eachother?Thanks.First do this thought experiment: Take out the old motor (500#?), add 1200 lbs batteries. Now clamp a 10 Hp outboard on. Put on really good ear plugs. At WOT you would get maybe 6-7 mph for 60 - 90 minutes. Maybe 4x run time at 4-5 mph. That's what your electric boat will be like. If that seems good to you go ahead. You are looking at several thousand dollars for a motor and controller that big. You would need a hefty charger too.Old deep V fiberglass hulls are a dime a dozen but are the worst possible hull form for efficient electric power. A boat shaped like a big canoe (think old sail boat sans keel) is the best design for easy propulsion.Denny----- Original Message -----From: stefSent: Saturday, October 09, 2010 6:22 AMSubject: [Electric Boats] Want to convert a glasstron 184 to electric. Any advice?Hello,
I've been leeching the group for a few months now, and became enthousiast in electric boating.
Currently have a inflatable with an little outboard electric, and i really love the silence, and the ease of boating. (never expected that..)
Now, i can get 32 batteries AGM 12V 80Ah for free from a relative (4 years old, come from a no-break system), so i want to convert a boat to electric.
Currently, i found a Glasstron 184 with a broken engine, but in exellent shape, and overhauled tailpiece.
Can anyone give me advice about motorising this speedboat?
I was leaning towards a 10 to 20Hp series wound dc at 96 volts, with 3 battery banks in parallel, giving me 96V and 240Ah.
Any ideas, or recommendations, before i actually purchase the boat?
Biggest question is if the hull of the boat is capable of being thrusted by electric, instead of the original 165Hp six cilinder inline...
Many thanks!
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