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    Electric boat race: 24 miles on MD Eastern Shore

    https://electrek.co/2017/10/18/electric-boat-record-pure-watercraft-outboard
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    Dynomometer from Harbor Freight?

    Harbor Freight offers this 10000peak watts brushless generator. http://www.harborfreight.com/10000-watts-max-7200-watts-rated-belt-driven-generator-head-45416.html Is this something that could practically give hp output readings on some of the larger motors? What would you use as a load? The...
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    Electric boat marathon (race)

    This seems the right place to alert electric watercrafters of a 25 mile electric boat race on the Chesapeake this Fall. The Wye river on the Eastern Shore is the racecourse. Mark your calendars for October 2. Rules of the race: http://www.electricboats.org/2010-Wye-Island.html How it went...
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    Adopting Power Tool Batteries to Our Broader Uses

    Home Despot today has 4Ah 18volt replacements 2 for $100. I can see the time when your bike carrier has three or four plug-in receptacles for a Makita or DeWalt or whomever lithium batteries. You wheel out your electric bike, grab a battery from your string trimmer, another from the recip saw...
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    Phase wire modifications

    In the RC world, I've learned you can shorten/alter the length of phase wires. Is this true also for Heinzman PMS 120 series motors? In the photo you'll see phase leads in pairs going to each terminal of the controller U V W. I'd like to take each pair at the motor exit, join them, and run a...
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    5 hp motor: highest reliability, highest efficiency

    I'll preface this:Endless Sphere is a great forum where braincells run rampant and wild. Thanks. My dilemma: how to win an all-electric boat race, the Wye River Electric Boat Challenge. The race starts on the first friday in October each year, out of St. Michaels, MD. Or more accurately, from...
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    Buyer Beware

    I was just shopping eBay for a 6374 motor. This appeared http://www.ebay.com/itm/231286177264?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649 so while they throw in the measurements, which clearly don't meet the 6374 designation, they still have the balz to try to conn you into their product.
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    Controllers that WORK

    I'm dead in the water for lack of a working reliable controller. First try was a Castle Hydra ICE 2000, and then I learned these are designed for inrunners. Dollars drained. Great product, fine support from CC, but there wasn't even fine print to alert me that these are InrunnerDesigned...
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    Where are these amps coming from?????

    YOu can see the layout. Those are Aeolian 6374 motors, 2000watt controllers, 48volts from Nissan Leaf; two lowtech blowers to cool the motors. The motors are sensored with equals0designs hall sensors. All the following numbers are no-load: At 300 rpm I'm drawing .4 amps ; at 3200rpm it's at...
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    EV Esc for planing boat

    When assembled, this is my powerstick. Outermost, an eminently developable prop. Innermost, the 6374 brushless within the large aluminum tube. It clamps to the propshaft via that SS HelixCal. The prop thrust is taken outside a hole in the transom. The hole is sealed with a constantvelocity...
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