RC Boats General Discussion Discuss general rc boating topics here.

Iíve blown over $2000 in motors this week.

Reply

Old 05-30-2018, 06:20 PM
  #1  
kyleRCnovice
Junior Member
Thread Starter
 
Join Date: May 2018
Posts: 1
Default Iíve blown over $2000 in motors this week.

Yep. :/

I thought I knew my **** but apparently I donít. Iím hoping someone can help me figure out what is causing my motors to overheat and fail.

Iím running this on a bench on a rig to test for thrust and power consumption. Sadly I canít even get that far. Hereís what I got setup:

110KV 4500 watt inrunner dc brushless motor. Liquid cooled by inmmersion in water. The casing is sealed meaning no water can enter the motor internally to damage it.

Powering this thing is a 50v 200amp ESC. Also cooled by immersion in water. Was blowing 120amp ESCís but I stepped it up to a 200 and havenít had a problem with ESCís since.

Battery is 14s lipo.

Prop is a custom design with a diameter of 5.5 inches. I assumed that I was over propped and shrunk to 3 inches to see the effect. Blew another motor.

I have all the data in the world for how this system behaves: RPMs, temps, amp draw etc.

Anything you want to see I have it.

Iím a longtime lurker on this forum and Iím really hoping someone knows how to help me problem solve this because Iím at my wits end!
kyleRCnovice is offline  
Reply With Quote
Old 06-04-2018, 07:27 PM
  #2  
Hydro Junkie
 
Join Date: Nov 2004
Location: Marysville, WA
Posts: 7,555
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Too much battery would be my first guess. If you have no objections, I'll take this post over to another forum and see what some of the guys can come up with
Hydro Junkie is offline  
Reply With Quote
Old 06-05-2018, 03:47 PM
  #3  
Hydro Junkie
 
Join Date: Nov 2004
Location: Marysville, WA
Posts: 7,555
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Okay, I've got a couple of guys that have responded but, unfortunately, they need more information. They have requested the following:
1) What kind of boat are you going to put this in?
2) Are you cooling the ESC and motor with water INSIDE of their cases
3) What kind of speeds are you trying to get with your boat?
4) With you test rig, do you know what your prop pitch is?
I think your data would also be helpful to the guys in the other forum
Hydro Junkie is offline  
Reply With Quote

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service