T-Pain Is On A Boat: Re: [Electric Boats] Electric Antique Runabout Project Thouights

Has anyone tried dual counter rotating props in a slow speed application?

On Dec 29, 2015 12:25 PM, "Mark F mark.internet@yahoo.ca [electricboats]" <electricboats@yahoogroups.com> wrote:

googled the boat, nice looking project.

1st question would be how fast do you really want to go and for how long?

I have a 14 ft fiberglass boat with a 20Hp leg.
I am using a 3 HP treadmill motor(DC 90 Volt rating)

I used a 48 Volt controller at 50 amp max.
Boat speed was around 3 Knots.

Unfortunately I have not been able to find a reasonably priced controller at 90 Volts DC.(usually way more power than I need)
I hope to find enough time this winter to build a 90 Volt DC controller.
This would give me more RPM and hopefully better effiecency and faster speed.

I used NIMH batteries from a ford escape hybrid, and placed them in the front of the boat.
These batteries are too heavy for the power they deliver in a boat.

I will be using Lithium this summer.

For my use, your configuration would be more power than needed.
I have found my air cooled controller was fine(less complex)

I designed mine to have the controller mounted near the rear of the boat.
Only the DC wires from the controller ran to the motor.
This gave me more space and less heat under the motor hood.
The brushless system you have would all need to be under the hood, I think.

If you plan on pulling alot of power from your batteries, how would you cool them as well?

You are still in the planing stages, you need to define what your use is and go from there.
More power than needed = more batteries = more weight and more money.

Mark

Good luck with your project

Mark

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On Sun, 12/20/15, llplummer@gmail.com [electricboats] <electricboats@yahoogroups.com> wrote:

Subject: [Electric Boats] Electric Antique Runabout Project Thouights
To: electricboats@yahoogroups.com
Received: Sunday, December 20, 2015, 9:20 AM

I am restoring a 1955 Penn Yan Swift
and am looking into powering it with a 1962 12 hp outboard
converted to electric. It is a 12 ft race boat that weighs
around 600 lbs and was designed to be powered with a 25 hp
outboard. I have been talking to the guys over at
Thunderstruck motors about the Motenergy ME 1302 as the powerplant
with a Sevcon controller. For the batter pack I'm
considering the Leaf batteries from the guys over at the
Hybrid Battery Center configured into a 12 Kwh package
running at 96 volts. Gear ratio for the old outboard motor
is 13:21 with the gas motor range of 4400-5200
rpm.
Any thoughts the group has on
the project would be greatly appreciated. This is my first
EV project and engineering school was a long time ago.
:)

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