T-Pain Is On A Boat: Re: [Electric Boats] Transom mounted outboards

Tuesday, September 11, 2018

Re: [Electric Boats] Transom mounted outboards

Jeff,

I never went with the full electric conversion. My experiments were only with the electric outboard. I eventually got the Atomic 4 gas engine running. When I sold the boat, I kept the Torqeedo, and gave him the Traxxis 80 as a (slow, but functional in an emergency) backup with the Atomic 4.

John

On Tuesday, September 11, 2018, 11:24:53 PM CDT, JD jpgroupfinancial@yahoo.com [electricboats] <electricboats@yahoogroups.com> wrote:

Hey John, Darin,

Are you saying you both have trouble with your new electric motors on your inboard too?

I also have a C-30 and just took out the old A4 and replaced it with a 12.5 kw electric engine running off of four 255 amp hr agm batteries.

Everything is now mounted, installed, and ready for my first test run.

Just wanted to see if there was something I should be looking out for and wanted to know why you have the outboard (is the the main electric engine not reliable?).

Many thanks!

Jeff

On Sep 11, 2018, at 10:54 AM, oak oak_box@yahoo.com [electricboats] <electricboats@yahoogroups.com> wrote:

Darin,
I had a Catalina 30 sailboat that also suffered from motor reliability issues.
I installed an outboard motor mount, and installed a Torqeedo 4R, with a 48V battery pack.
The Torqeedo 4R has the "remote" throttle and control box that is connected with about a 10' cable that looks like the old fashioned 4 or 6 wire telephone cables (and similar connectors).

When I needed to motor, I would drop down the motor, lock it going forward, then drop down the motor mount. The throttle was attached near the steering wheel for the boat so that I could control on/off, forward/reverse, and speed, as well as see the power going to the motor. The existing steering wheel and rudder were used to steer the boat. This works great out on the open water. For close quarters (docking) - it would be very helpful to be able to turn the outboard.

For the C-30, I recorded a top speed of about 5mph at 3500W. Due to my batteries and cables, 3500W was fairly high for my setup, though the motor is rated for 4000W. Due to hull speed, I don't think I would be able to get the boat going much faster than 5mph under just outboard power.
2000W - 4.1mph
800W - 3mph

A larger boat will probably go slower.
BE AWARE that backing with an outboard motor will also be severely underpowered.

Note - You will observe that an outboard with very little power will make a noticeable improvement on your sailing speed and handling. With a SMALL amount of power (100-300W), you'll see a sailing speed improvement of another mph, and you'll easily make it through tacks that would have been "iffy" without additional power.

We also tried using a Traxxis 80, 24V trolling motor to have just as a "backup". At high speed, it would push the boat at about 2mph.

Good luck!
John

On Tuesday, September 11, 2018, 10:26:14 AM CDT, armyofpenguins@gmail.com [electricboats] <electricboats@yahoogroups.com> wrote:

Hi all,

I am starting a project to repower a 37ft (10ft beam) sailboat that currently has a non-running diesel inboard. There was also previously a 9.9hp outboard mounted on the transom. The outboard was DOA and has been removed at this point. However, I am considering replacing it so that I have a means to motor across the way to the DIY yard for haulout and so that I have an emergency means of propulsion while working out the kinks in the new electric propulsion system. Does anybody have any suggestions about how I could control the outboard remotely? I posted a photo of it which shows that there's no practical way to handle the tiller while seeing where you are going. Thanks in advance for any helpful suggestions.

Darin

__._,_.___

Posted by: oak <oak_box@yahoo.com>

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