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I'm aware that motor efficiency (power out/power in) increases with higher voltages - looking at the power curves for just about any DC motor, be it a series wound Advanced DC, an Astroflight Cobalt

I checked out the web site for the LEMCO motor, and sent off an email to Wilde EVolutions, and about a half hour later, Roderick Wilde called me. He was very nice and is sending out literature and a

Chris.response to you is on message 217 but it doesn't show up on home page ??? Don't know why.

www.evparts.com

The reason the motors work so well at lower RPM is larger diameter. The smaller the diameter/number of polls the higher the rpm and lower torque at low rpm. Conversly...the larger the diameter and

Chris..forgive me my friend..but read what you wrote...1st. Higher voltage motors are more efficient. 2nd 12V X 30 amps=360 W and 36V X 10 amps = 360W which is right..on a small motor that is at 1kw

In my last posting I had given a breif discription of the electric outboards I build. The description was pretty lousy to say the least! Therefor, I have posted a diagram of the motor, in the

william:<br><br>what part of the country are you in? I may know of a boat in Chesapeake Bay region you might be interested in. you can e-mail me directly at reata.bill.swanson@... if

First off, I would like to say Hello to everyone here! I am certainly impressed with what I have read in your postings! I live Columbia Maryland (it's in between Wash. D.C. and Baltimore)<br>I have

Good observation Chris, the battery people look at Watt/ KG that is to say how many watts can a given battery package produce per unit of weight. It makes no difference in the batteries to a point.

What is the main reason why those motors work so well at low rpm? Also, I note that some very small brushless PM motors spin at high rpms to yield good power. Is this because power output is a

I'll grant that higher voltage systems are more efficient, but I don't understand how having the same number of batteries in a parallel system versus a series system results in a higher amperage draw

You will find that the RPM's these PM motors work best at are something less than 1500. This is the real reason why they are so good at pushing props when used in a direct drive mode. It is also why

I have been following this line of dialogue because like most members I am very interested in the types of motors available to us. In that context, there is an informative "motor" site at <a

Hi -<br>I've been reading the entries in this forum over the past few weeks, and thought I'd join in. I've designed and built two PV/battery electric inboard boats with high school students, and have

Am I missing something! Where do you get the idea that gears are not efficient. They have a lot less friction than belts. Look at a 200 hp ob motor. You can spin the lower unit with your small finger

Good to see more members, more input and more sources - there's also more questions!<br>As i wish to retro-fit an o/board, my existing bevel gears must stay. What options are there? A belt down a

It sound like a fun project. I am finishing up mine this spring. Check out the photo I posted. I hope to have some more later. They might give you some ideas.

Thats a very good design, Particularlyy with the high effency Permenate Magnet (servo) motor and the Kortz Nozzle. The only objection I have to it's design is that he is using a low effency gear drive

I also found this electric outboard<br>Looks interesting.<br><br><br><a href=http://www.qis.net/~jmgraham/resrun.htm target=new>http://www.qis.net/~jmgraham/resrun.htm</a>