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It told me the hull speed of my 1700 lb, 19.75' LWL boat was 8.8kts! Way more than the traditional calculation, way more than the designer's calculation and way more than my own experience. And I

Here's a link that calculates hull-speed by length AND displacement. Its for slippery displacement sailboats, and ought to be close for electric hullforms, too. I suspect the Hp calculations are for

I could really use some quick help/advice/opinions here.... please!<br><br>The story is that I am just about to plunk down my hard earned cash on a new 18' Premier manufactured pontoon boat and

Good as always to read discussions on motor types and preferences. Mine is for an AC induction outboard as brushes, shaft mechanism can be omitted. My original plan was a diesel-electric unit, but

Larry, I am looking into that myself now. My impression is that a shunt wound should be about $500 and that a 11 h.p. PM from Lynch Electric is about $3,000. I would like to know what a PM from

So what's the cost of a 4hp shunt wound motor to a private individual like myself? What's the cost of the controller? What are the comparable costs of the PM motor and contoller?<br><br>Larry

Shunt-wound motors are superior to series wound for electric boats and should be seriously considered for all boat designs that do not use a permanent magnet motor.<br><br>(1) series wound motors

Nicely put Donaldbaer..simply put..the magnets don't require burning energy to be magnetic. Also, mmotsenbocker, if you check the life expectancy of Neodymium Iron Boron magnets/or even Simarium

Thanks, the sugestion of using the pulsed control is good and gets you off the bottom rung of motors. There is a lake near here that rents electric motors. I am going to try to rent one with a canoe.

While it is true that in the past wound field (shunt wound motors) had better brushware this is no longer true in the past 10 years or so with the newer magnetic matierals the performance and

There has been much discussion about the merits of permanent magnet "PM") motors and where to buy them etc. However, shunt wound motors (fixed electromagnet replaces the permanent magnet with its

I guess YAHOO is still working - however with all the good weather perhaps most of our members are indeed out on the water. I spent 1.5 hours on the Erie Canal yesterday (5/30) morning and thoroughly

We took the 20' electric launch out on the Mississippi today for 4 hours near St. Paul, MN. 4 adults, 2 kids, 1 infant. Ran at 36V w/ 6 group 24 12 v batteries. Typically drew 40 -50 amps, sometimes

I haven't seen any new messages since the 22nd. Is Yahoo acting up, or has eveyone been out cruising in their electric boats all weekend? I was out for a couple of short runs. I was checking on my amp

The first time I heard of Ray Electric Outboards was when I bought a place on the river and wanted a runabout but didn't want to lug a gas tank up and down the bank. An extension cord sounded much

Frank<br>Thanks for your comment we BOTH speak factually about field currents. I have experience installing small Hydro-electric schemes using car alternators. Bench testing was shaft against a rear

The motor I've installed is 6HP, from Solomon Technologies. <br><br>A side note, Wednesday I stopped by the Tour de Sol electric car rally. Saw about twenty cars, it was interesting to see how complex

Monty,<br><br>The description you gave regarding residual magnetism in the "iron" of an alternator allowing startup, is true only for Generators....not Alternators, which require 1 or 2 amps field

Getting back to physics. The formula HP=Torque x RPM/K if the torque is given in ft lbs the K=5252. If the torque is given in in.lbs then K=63025. <br>"In my case, the motor would need to produce a

So??? You left out the punchline. What type and size of motor did you get?