Brushless Motor Help

I am building a 1/144 Lutzow and want to put brushless motors in them. I like the power and size of them for this build. However, I dont understand brushless size numbers at all. I need two for the drive and one for the pump. Preferably all the same voltage. Any help would be appreciated

 

Brushless motors do not have voltage ratings. I would recommend two 2830 700 kv motors direct drive. You will also need two 30 amp bi directional esc's I use this setup on all my light and heavy cruisers

 

How come you have to use two ESCs? How do you hook up both to the receiver?

 

Because they are brushless and if you try to drive two motors with one ESC you could burn up that ESC. Brushless phased motors. If you stall one it will stall both. You just hook them up with a Y cable to the Rx.
I run dual brushed off a single ESC and can stall one motor and limp along on the other.
Some reading:
https://www.rcgroups.com/forums/showthread.php?1357604-Two-Brushless-motors-on-One-ESC…-YES!

 

Awesome. Thank you.

 

What size props are you using with that setup?

 

For Lutzow I’d use four blade 1.25” or 1.5”. I lean more to the 1.25”.

 

Sweet! That's what I got! Should have the motors here by Sunday. Should be able to get the pump, drive motors, and rudder in next week.

 

Do you have a good technique to set the shafts correctly? I'm semi happy with where they are now but was hoping to make them better.

 

Got some photos. Easier to look at them than type.

 

I like to draw a couple of circles on a piece of scrap plywood, the size of my props, separated by 1/16". Use this to make a template, cut it out, an drill it, then put your prop shafts through it and use it on the outside of the hull to align the shafts. On the inside, either do something similar, or use the gearboxes, etc.

I hope that made sense.

 

It does. Thank you!

 

Pictures of shaft alignment on a lutzow here
https://rcwarshipcombat.com/threads/dkm-luetzow-ircwcc.446131/

 

Thank you.

 

Would you mind sharing your STL file for your rudder servo mount?

 

sure thing, I'll try to post it this weekend