Hey George
Sorry for the delay but awesome boat! Looks very comfortable. While not a
deep ocean vessel it would be an awesome canal/lake boat as you built it
for. The members of the group can be very helpful with specific problems,
response is generally great! Have you submitted your craft to be on the
evalbum? Makes it easy for anyone on the group to quickly check your specs
before answering any of your questions. If you are looking to add an
autopilot feel free to PM me, your dual motor skid/steer setup is very
similar to my Firefly.
Thanks,
Dan
http://www.evalbum.com/3432
http://www.evalbum.com/4451
http://www.evalbum.com/4544
http://www.evalbum.com/4767
On Tue, Apr 28, 2015 at 1:21 AM, George McNeir via EV ev@lists.evdl.org
wrote:
Thank you to those that responded with actionable replies such as from
Medeck, Nickerson and Goren.
Medeck has some interesting work performed to date that is quite
successful on his electric powered family boat. A man blessed with artful
creation, creating a power train that really performs well. I hope you can
send some pictures.
Nickerson,
Storage 12 to 32 KwH depending on type of travel, weather, tide/flow,
insolation and other numerous factors.
Maximum package voltage nominal 24 for pack, motoring and controller.
Cruise is at 3 to 4 miles per hour at 24 volts at 30 to 100 amps depending
on tide, river flow and wind. Full power is at 24 volts and 300 amps for
each motor. And yields over 8 mph.
One or both motors can be used for cruising and steering differentially.
Motor ram/tiller steering is also used.
I have left a marina at 100% charge and motored 40 miles on a sunny day.
At sunset the battery bank was back up to over 90%.
Goren,
The oil cooled stainless steel HPEVS motors are very robust and would also
be in consideration. They are not only soundly designed but are works of
art. Thank you for reminding me to take a second look.
Dycus,
The table of offsets for the hull are from a noteworthy
Australian/American racing sailboat certified naval architect.
The hull form and weight are superior to any of your suggestions and at
12,000 pounds for a 40 foot boat with lead acid batteries, far slicker and
lighter than you suggested, for my purpose.
You might reread the site and blog to find that its draft is only 18
inches and configured for grounding (sitting level) daily.
The original boat ran Annapolis, MD to Wilmington, NC (over 520 miles)
totally solar, on less solar energy and less efficient motors than are
currently employed.
An university professor I know did power (a hybrid) canal boat but found
it a bit hard to handle (flat bottom) with only the one electric motor in
coastal, tidal, salt waters. 50% of the time he relied on the small diesel
engine. He and the wife completed the Great Loop of nearly 6,000 miles.
By the way, how is your three wheeled car coming along?
Best to all,
George
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