Dave:
I really appreciate your efforts to help me 'muddle' through this
learning curve (which for me is almost a straight line)
I have a tendency to inject a little humor into my everyday life and
humbly assure you that I meant no disrespect. On the contrary, I am thrilled
that I found this site. Everyone has been awesome and I have been deluged with
information that may never sink in. But I am determined to put an electric
drive in my sailboat!
I didn't actually mean you should have a 'pull off' because with that much
pull, something is bound to break!
HOWEVER:
If you did pull your stern completely off, I understand that no water will
come in as long as you can keep your speed up.
PS. I was only kidding about Tom not being my real name.
Actually it's Trent! (only kidding Pal)
Thanks for your help Dave K.
Regards, Trent.
pps lighten up!
In a message dated 5/29/2009 9:45:19 P.M. Eastern Daylight Time,
inganear1@yahoo.
Hey Tom,
I am running a 14 inch 13 pitch 3 blade prop inside a Rice Power/Speed
nozzle, this gives me the most effecient use, my friend with the 50 hp diesel
is running a 13 inch 8 pitch open 3 blade prop........
First I would never hook the 2 boats stern to stern for a pulloff, that to
me is just BS. Both tests were made with the same 550 lb. pull scale.
At 3000 rpm's he had slightly more pull than my electric but he never runs
his diesel at that rpm. At 100 amps I was reading just a little over 300
lb pull. At the 3000 rpm's diesel he was about 20 lbs pull over the
electric..
That's the no BS account..... believe it or not is your choice...
Dave K (my real name)
-- On Wed, 5/27/09, _iloveamercedes@
(mailto:iloveamercedes@
From: _iloveamercedes@
<_iloveamercedes@
Subject: [Electric Boats] RE: Electric power for over 30' [Question for
Dave K]
To: _electricboats@
Date: Wednesday, May 27, 2009, 3:38 PM
Hey Dave, I am intrigued at the prospect that a rated 8 hp electric motor
can have the same pulling power as a 'rated' 50 hp Diesel motor!
Now I may not understand what "Bollard Pull" is... but I do understand
that there are a few things people s-t-r-e-t-c- things people
s-t-r-e-t-c-
is about Gas Mileage and evidently the other one is the power electric
motors produce. lol. Ok Dave, I'm only kidding but please help me to
understand
how this can happen? I mean 'Efficiency' can only do so much!
Is this '300 lb Bollard pull' at startup, full speed or someplace in
between and if this is true, why am I looking at a bigger motor? A 300
pound
pull is a lot of pull/push... pull/pus
So let me recap:
If you took a 20' line and hooked your sailboat (8 hp) to your friends
sailboat (50 hp) Stern to Stern and you both opened throttle; Nothing
would
move until either you ran out of electricity or your friends sailboat ran
out of Diesel.
-Tom- (not my real name)
In a message dated 5/27/2009 11:08:35 A.M. Eastern Daylight Time,
_inganear1@yahoo.
Tom, there are several projects completed and many underway in
approximately your size range. 48 volt systems seem to be the normal
voltage for most
but some run on 36 volts. Look through the photo section, you'll find
several to draw ideas from. There are several guys one the site that are
building a business out of electric conversions making kits/pods and
other
things that may be of interest to you. My boat is a 30 ft ChrisCraft
Capri
sailboat that weighs in at 12000 lbs. I use a Etek brushed motor 8 hp
and
have the same bollard pull as a friend of mine on his 50 hp diesel, (a
little over 300lbs), so you see it's not just rated Hp that does the job,
it's
also efficiency..
Dave K
--- On Tue, 5/26/09, Tom <_iloveamercedes@
(mailto:_iloveamerc
wrote:
From: Tom <_iloveamercedes@
(mailto:iloveamercedes@
Subject: [Electric Boats] RE: Electric power for over 30'
To: _electricboats@
(mailto:electricboats@
Date: Tuesday, May 26, 2009, 8:15 PM
Hello everyone!
I know there must be a thread for powering sailboats over 30' with
electric motors. Can someone direct me to it?
My sailboat is a Cal 35 Cruising. She is of 15,000 lbs. Displacement.
I think this project would need around 35 hp. She has a 4-108 Perkins of
'Claimed' 50HP hahahaha!
Anyway, with what little I know about this, I would need a bank of about
5
Golf Cart Batteries.
I also want to utilize Solar Panels as well as a Gas Power Generator.
So let me know how screwed up my ideas are so I can get an idea of where
to start here.
Thanks
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