New to brushless..help

[boater76]

I was thinking of going brushless for my next build but I know nothing bout it. Can anyone help me out? Thanks.

Ken

[sailr]

Ask some questions and we will try to help you. Kinda hard to start from a blank page.

[Rex R]

you should build the boat first, then fit the motor to the boat. generally speaking you would be advised to keep the boat under 34" if you wish to keep the costs down (somewhat ).
rex

[sailr]

I would suggest the first thing is to tell us what your budget is for your project!

[Steven Vaccaro]

I was thinking of going brushless for my next build but I know nothing bout it. Can anyone help me out? Thanks.

Ken

Spend as much time as you can reading the forum, than ask all the questions you will have.

[bustitup]

I was thinking of going brushless for my next build but I know nothing bout it. Can anyone help me out? Thanks.

Ken

my sugestion is to by a nice rtr like supervee or ul-1 and learn that basic system first...then either move on or upgrade

[boater76]

For starters. What do the numbers mean after the motor size. I know the s is short l is long.

[boater76]

And kv and any other number and letters associated with the motors.

[Jesse J]

My suggestion would be to make a spreadsheet to get to know what the numbers mean and what they MEAN to you as boater maker go faster.

start with feigaos, not only financially but conceptually.

the can diameter size is set aside e.g., 540 or 580.
then the number is similar but don't know how related to the number of turns,
while yes the letters are the can length.

All makers have slightly different KV ratings and power (watts)

I have made myself one of these spreadsheets and keep it handy, cause it is hard to memorize all these numbers. In your spread sheet, include MAX volts and then for really cool part: make a couple columns that allow you to multiply volts by KV to get nominal rpms. I made mine from 2S to 6S and color coded anything over 40K rpms red and under 30K blue, 30-40k being what I understand to be the highest efficiency zone.

A question to others, are these some kind of AC motors, versus DC? how exactly do they work? and what are the poles all about?

[Flying Scotsman]

The designation KV refers to the volts to rpm formula. the short or long refers to the length of the motor. Short motors have a very high KV and are suitable for small hulls..19" the L motors are suited to 25".. XL up to 30" and I am being conservative without knowing what hull design, power, run time, prop you desire?

Jesse, now you know I am a slow typist. Looking forward to meeting with you in Vancouver

Douggie

[sailr]

unfortunately different manufacturers use different motor numbering systems. For example, I have no idea by looking at a number on a NEU motor what the specs are. But I know I can go to a chart on OSE for the NEU motors and get the info. The simplest ones are something like 3574 which would be 35mm diameter and 74mm length. KV is the RPM per volt and is a 4 digit number like 2200 or 3600 or 1800, etc.. The KV determines which batteries and even props you can successfully use with the motor and gives you an idea which type of boat that motor would work best in.

There are a couple of spreadsheets somewhere here on OSE that list all of the motors and their specs. I'll see if I can find it and post a link here. Very helpful.

For starters. What do the numbers mean after the motor size. I know the s is short l is long.

[sailr]

This thread has a lot of good info: http://forums.offshoreelectrics.com/...read.php?t=271
And this one on RC Universe: http://www.rcuniverse.com/forum/m_7603257/tm.htm

[boater76]

Thanks for the info so far!

Ken