Lars. A few years ago I built a twin EL rig. It was a 19' Redwing outboard Launch. Had 2) 36V, 109lb. MotorGuide motors. Used 12" Torqeedo 3 blade props. Bottom line was YES, one of those motors needed to be in reverse. I did testing and the turn radei wern't even close. Printed a left hand prop and we were good to go. I'll try to attach a photo.
Good luck, Glenn H,/ NC/USA
From: electricboats@groups.io <electricboats@groups.io> on behalf of maaseidvaag via groups.io <maaseidvaag=yahoo.com@groups.io>
Sent: Thursday, January 29, 2026 9:49 AM
To: electricboats@groups.io <electricboats@groups.io>
Subject: Re: [electricboats] Pocket Trawler Electrification
Sent: Thursday, January 29, 2026 9:49 AM
To: electricboats@groups.io <electricboats@groups.io>
Subject: Re: [electricboats] Pocket Trawler Electrification
That's interesting that the control software monitors wattage. I doubt I'll ever see 6000 watts, and after testing may even use the option in the software to set the maximum output to a lower wattage under the assumption that that will give me finer control at the lever if the full range no longer represents 6000 watts. We'll see once I'm on the water.
I'll give the folks in Canada a call on that LH prop. I was planning on carrying a spare prop, so I guess I might as well try the LH prop, subject to finding out what the price becomes after whatever tariffs are applied. My understanding is the rotation direction is reversed by swapping the outside two phase wires on the controller.
If I do manage to get my hands on the LH prop, then the next decision is which way to rotate them. They will be fairly closely spaced on either side of where the existing prop sits now, so I expect there will be some interaction of tip vortices (if that's the right term?). So, do I have the props spinning downward on the inside edge of their circle, presumably drawing water downward at the centerline of the hull and creating a lower pressure zone between the props and the hull (this feels right) or the opposite, having the tips spinning upward at the middle. I'd love any thoughts/experience others have on the topic.
Thanks - Lars
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