where did I see where a new boater complained the boat wouldn't plane.
Dealer investigated, found trailer still attached .....
Steve Spence
Renewable energy and self sufficiency
http://www.green-trust.org
http://arduinotronics.blogspot.com/
On 10/11/2010 12:15 PM, sv wrote:
>
>
> so the solution to this is very simple. boats need wheels.
>
> On Oct 10, 2010, at 2:26 PM, dennis wolfe wrote:
>
>>
>>
>> The drag IS that much different. I bet it doesn't take 10 or 15 hp
>> to power a 3000# Prius a steady 60 mph. It takes 330hp to hold a
>> steady 60 on a #3000 modern deep V planing boat.
>>
>> ----- Original Message -----
>> From: sv
>> To: electricboats@yahoogroups.com <mailto:electricboats%40yahoogroups.com>
>> Sent: Sunday, October 10, 2010 12:02 AM
>> Subject: Re: [Electric Boats] Want to convert a glasstron 184 to
>> electric. Any advice?
>>
>>
>> i'm new to this list and electric boats, but intrigued. Makes
>> sense, and great simple explanation. But I am wondering how they
>> are getting 2000# plus elec cars to move at 70mph, and without 100-200
>> batteries? Can't that tech be used in boats? Yes, drag of water is
>> worse than tires on pavement, but is it THAT much difference to cause
>> such a big drop in MPH? I guess a lot is lost with the nature of a
>> prop as well vs 4 rubber tires on pavement. But maybe the motors
>> they are using in these elec cars would be stronger and more efficient
>> as I/O's in boats - vs elec outboards? I'm sure there's lots of
>> considerations I'm missing.
>>
>> On Oct 9, 2010, at 7:24 PM, dennis wolfe wrote:
>>
>> >
>> >
>> > 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.
>> > To: electricboats@yahoogroups.com
> <mailto:electricboats%40yahoogroups.com>
>> > Sent: Saturday, October 09, 2010 5:26 PM
>> > Subject: 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.
>> >
>> >
>> > Op 9 okt 2010 om 22:49 heeft "dennis wolfe" <dwolfe@dropsheet.com
> <mailto:dwolfe%40dropsheet.com>>
>> > het volgende geschreven:\
>> >
>> >>
>> >>
>> >> 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: stef
>> >> To: electricboats@yahoogroups.com
> <mailto:electricboats%40yahoogroups.com>
>> >> Cc: stefwesbeek@tiscali.nl <mailto:stefwesbeek%40tiscali.nl>
>> >> Sent: Saturday, October 09, 2010 6:22 AM
>> >> Subject: [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!
>> >>
>> >>
>> >
>> >
>> >
>>
>>
>>
>>
>
>
No comments:
Post a Comment