Recent content by old-man-on-couch

PWC power requirements vs. efficiency That's definitely something I've been discussing with the other folks working on electric PWC's. Mostly, the hulls that are being tested with are pretty efficient, especially when you take 30-50 pounds off of them and put a lightweight rider on for testing...

(If you were asking me...) I don't know who this guy is, actually. He had the insight to patent an electric jet ski 10 years after hobbyists started making them themselves; next he's going to patent a paperweight made of something heavier than air... anyway- That's a pretty cool...

The first development ski was not picture worthy. There were a lot of things we did just for testing that were not representative of our intent (sensors, data logging, duct tape, bailing wire, vise grips), so we decided early on that the first one would be kept mostly to ourselves. The SX-R...

Well, we're not quite at 80hp... But DJKorn's ski should still be pretty cool. And it should be a little lighter than when DJ rode it. The good motor controllers don't have too much of a heat issue, and the batteries have been pretty well behaved as far as heat goes. Heat is an issue for...

You're pretty close to exactly right, and the funny thing is that's only 20% more than the requirement to get something with enough power to be fun. We're about 1 year into the project (we didn't think it would take 6 months...) and it's astonishing how much power is required to make an electric...

Electric motor torque The torque IS insane. At this point, I'm just running the (electric) Blaster2 in the tank with different voltage, battery, and impeller combinations to gather data. Initially, the thrust levels are very good, the battery life is so-so, and the weight will depend on what...