What does it mean, 3 sec run, verry hot.

pletang · Sep 30, 2009, 08:58 AM

I decided to plug this motor in last night. After 3 sec run, it is verry hot, I was running it on 3S to test.

B50 9XL 6.7:1

hpapilot · Sep 30, 2009, 10:21 AM

The motor got very hot after only 3 seconds of run time? What speed control and what prop?

pletang · Sep 30, 2009, 11:06 AM

CC80 setup is default. It was working ok before. I have not check amps, will do tonight

FL62 · Sep 30, 2009, 04:23 PM

Does the motor and gearbox spin freely? An idea of current draw would help. Most any motor will develop some amount of heat while free-running it, so it kind of depends on how "hot" it actually is. 125 F feels pretty hot to the touch when you are squeezing the motor in your hand while running it up....

Mike

pletang · Oct 01, 2009, 08:04 AM

Put the Watt meter on last night. The motor does spin, amps, one click on the power stick and the amps started at 5 and then it bounces all over the place I have seen 12, 30, 14, 40, 8, 5 ,12 and them the motor stops running and I can not hold the motor. When I test my 11XL is hold 8amps and it is not hot at all.

Quote:

Originally Posted by FL62

Does the motor and gearbox spin freely? An idea of current draw would help. Most any motor will develop some amount of heat while free-running it, so it kind of depends on how "hot" it actually is. 125 F feels pretty hot to the touch when you are squeezing the motor in your hand while running it up....

Mike

FL62 · Oct 02, 2009, 01:20 AM

sounds like the motor has a loose connection in one of the phases, ar possibly in a connector or something. Are you using bullet connectors or something similar?

pletang · Oct 02, 2009, 07:49 AM

I did run with bullet connectors, by process of elimination, I removed the connectors and I am running aligator clips for testing. I did noticed that were the three wires goes in the casing there is no rubber insulation were the three of them are close together.

Quote:

Originally Posted by FL62

sounds like the motor has a loose connection in one of the phases, ar possibly in a connector or something. Are you using bullet connectors or something similar?

pletang · Oct 02, 2009, 05:42 PM

When I spread the three wires apart, as far has passoble, the running hesitation dissapears and there is less heat.

FL62 · Oct 02, 2009, 09:08 PM

It sounds as though the wire insulation was worn away - the easy fix is to simply re-insulate the wires using shrink-tubing. Try to get one large pieceslid as far down each wire into the motor as possible.

pletang · Oct 03, 2009, 06:40 PM

You know what, I will be sending it in for maintenance instead.

Sep 30, 2009, 08:58 AM	#1
pletang How fast can you crash it. Join Date: Sep 2005 Location: Gatineau, Québec, Canada Posts: 182	What does it mean, 3 sec run, verry hot. I decided to plug this motor in last night. After 3 sec run, it is verry hot, I was running it on 3S to test. B50 9XL 6.7:1

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Sep 30, 2009, 10:21 AM	#2
hpapilot Oly crap.. Deese ease not gud! Join Date: Nov 2006 Location: Greensboro, NC Posts: 889	The motor got very hot after only 3 seconds of run time? What speed control and what prop?

Sep 30, 2009, 11:06 AM	#3
pletang How fast can you crash it. Join Date: Sep 2005 Location: Gatineau, Québec, Canada Posts: 182	CC80 setup is default. It was working ok before. I have not check amps, will do tonight

Sep 30, 2009, 04:23 PM	#4
FL62 Never enough power..... Join Date: Feb 2004 Location: Mesa, AZ Posts: 882	Does the motor and gearbox spin freely? An idea of current draw would help. Most any motor will develop some amount of heat while free-running it, so it kind of depends on how "hot" it actually is. 125 F feels pretty hot to the touch when you are squeezing the motor in your hand while running it up.... Mike

Oct 02, 2009, 01:20 AM	#6
FL62 Never enough power..... Join Date: Feb 2004 Location: Mesa, AZ Posts: 882	sounds like the motor has a loose connection in one of the phases, ar possibly in a connector or something. Are you using bullet connectors or something similar?

Oct 02, 2009, 05:42 PM	#8
pletang How fast can you crash it. Join Date: Sep 2005 Location: Gatineau, Québec, Canada Posts: 182	When I spread the three wires apart, as far has passoble, the running hesitation dissapears and there is less heat.

Oct 02, 2009, 09:08 PM	#9
FL62 Never enough power..... Join Date: Feb 2004 Location: Mesa, AZ Posts: 882	It sounds as though the wire insulation was worn away - the easy fix is to simply re-insulate the wires using shrink-tubing. Try to get one large pieceslid as far down each wire into the motor as possible.

Oct 03, 2009, 06:40 PM	#10
pletang How fast can you crash it. Join Date: Sep 2005 Location: Gatineau, Québec, Canada Posts: 182	You know what, I will be sending it in for maintenance instead.