burning up motors and esc's
#1
Member
Thread Starter
Join Date: May 2014
Posts: 46
Likes: 0
Received 0 Likes
on
0 Posts
burning up motors and esc's
I recently replaced a brushless motor and ESC in a rebuilt plane laying around. The motor is a Gforce 400 and a Castle 30 amp ESC. I used the recommended prop 10 x4.7 slow fly. I ran it stationary for about 1 minute when the ESC caught fire and the motor fried itself. I replaced the ESC with a generic and replaced the motor with a similar 400 size motor. Used a 9 x 5 prop slow fly. Ran the setup again. This time it lasted about 2 minutes at which time I shut down. The ESC was very HOT and the motor would burn your finger if touched. I let everything cool down and dropped the prop size to an APC 7 x 6E. The ESC got quite warm and the motor got hot but not to the point of getting burned. I can only surmise that the bigger props were too much of a strain, even though that was the appropriate setup from the manufacturer. Any thoughts?
#2
You listed the motor, ESC but what battery? 2s, 3s, 4s, 5s, 6s? If the listed prop was for a 2s battery and you plugged in a 3s battery you would and could melt it. Do you have a watt meter? I think you should get one, it will help you to not let the magic smoke out.
http://www.valuehobby.com/accessorie...wattmeter.html
Buzz.
http://www.valuehobby.com/accessorie...wattmeter.html
Buzz.
#3
Member
Thread Starter
Join Date: May 2014
Posts: 46
Likes: 0
Received 0 Likes
on
0 Posts
Let me clarify a few things. I was running a Turnigy D2826-6 2200kv Outrunner Motor with a 30 amp ESC. on a 3s. I even hooked a 50 amp ESC. The motor still got hot but the ESC remained cool to the touch.
#4
Here is an online calc tool. It will give you an idea of what your motor can handle.
http://ecalc.ch/motorcalc.php
From your link, it says this"
[h=3]Suggested Prop: 7x4(2S) ~ 5x5 (3S) "[/h]
So if you are using a 10 inch or 9 inch prop you are way over propping it. Max current is 34 amps.
From one of the comments
"Tony, this motor can easily take 6*4 prop on 3 cell. Anything less than that size prop is perfectly fine. With 6*4, it gets warm on continuous throttle." They are using a 6x4 prop, you are using a 9x5 and 7x6 prop. To much prop.
Buzz.
http://ecalc.ch/motorcalc.php
From your link, it says this"
[h=3]Suggested Prop: 7x4(2S) ~ 5x5 (3S) "[/h]
So if you are using a 10 inch or 9 inch prop you are way over propping it. Max current is 34 amps.
From one of the comments
"Tony, this motor can easily take 6*4 prop on 3 cell. Anything less than that size prop is perfectly fine. With 6*4, it gets warm on continuous throttle." They are using a 6x4 prop, you are using a 9x5 and 7x6 prop. To much prop.
Buzz.