Normal Motor Temps???  
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Normal Motor Temps??? - 2/17/2006 3:20:05 AM   
patternflyr



Posts: 170
Joined: 1/16/2003
From: Griffin, GA, USA
Status: offline 		Hello,

I was wondering what is considered to be a normal motor temp after a flight? I have just started to "break in" my batteries by running the motor. I am seeing my motor at 120-130 degrees F after running two 3 minute periods at half throttle. At what temperature does the motor get damaged? I am running a Plett 30-10, phoenix 85hv and Tanic 5s2p packs. I hope I will finally get this plane in the air this weekend, if the rain will hold off.

Thanks,
Emory.
       Post #: 1

RE: Normal Motor Temps??? - 2/17/2006 8:54:43 PM   
Dean Pappas


 

Posts: 175
Joined: 1/27/2004
From: South Plainfield, NJ, USA
Status: offline 		Hello Emory,
With proper ducting, I have gotten the temperature of my AXI 5330/18 down to 15 degrees F above whatever the air temp is, after a full FAI P-07 with a 63Amp full throttle load.
I have to figure out how to attach pictures, in this forum.
Dean Pappas

(in reply to patternflyr)
       Post #: 2

RE: Normal Motor Temps??? - 2/18/2006 2:48:12 AM   
J Lachowski


 

Posts: 407
Joined: 9/2/2003
From: Bridgewater, NJ, USA
Status: offline 		Dean, Click on Reply. There is a click here to upload link on the bottom of the dialog box

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Joe Lachowski
NSRCA 330

(in reply to Dean Pappas)
       Post #: 3

RE: Normal Motor Temps??? - 2/20/2006 8:08:48 AM   
VerneK


 

Posts: 51
Joined: 3/7/2005
From: Livonia, MI, USA
Status: offline 		Hi Emory,
My understanding from previous posts is that you won't get adequate cooling if the airframe is stationary or you have the motor on a test stand. Assuming reasonably good ducting on your plane, the motor will run a lot cooler in flight than it does on a test stand. For some strange reason, this actually makes sense to me but I'd be hard pressed to explain it.

Verne Koester
quote:

ORIGINAL: patternflyr

Hello,

I was wondering what is considered to be a normal motor temp after a flight? I have just started to "break in" my batteries by running the motor. I am seeing my motor at 120-130 degrees F after running two 3 minute periods at half throttle. At what temperature does the motor get damaged? I am running a Plett 30-10, phoenix 85hv and Tanic 5s2p packs. I hope I will finally get this plane in the air this weekend, if the rain will hold off.

Thanks,
Emory.


(in reply to patternflyr)
       Post #: 4

RE: Normal Motor Temps??? - 2/20/2006 3:25:57 PM   
patternrules


 

Posts: 548
Joined: 7/28/2002
From: Nineveh, IN, USA
Status: offline 		Last year at the Midwest contest at Verne's field I checked Andrews temp just as the plane stopped rolling and it was just at ambiant + 2 or 3 degrees, but the longer it sit there the hotter it got. Whitin a couple of minutes it was up to (and I'm working from memory 6 months old) top of 130 to 140 degrees. So to me if you run a proven setup the temps in the air is way cool for the motor. What I think and this is just speculation is that after the plane is stopped heat is coming back to the motor though the wiring from the batteries. Would be interesting to unplug the battery and see if the motor temps still go up, if you could do it fast enough, even better if had plugs on the ESC to motor to check. Should be noted that Andrew has ducting to put most if not all incoming air over the motor.
Steve Maxwell

_____________________________

Steve Maxwell

(in reply to VerneK)
       Post #: 5

RE: Normal Motor Temps??? - 2/20/2006 4:50:10 PM   
can773



Posts: 1664
Joined: 1/25/2002
From: Calgary, AB, CANADA
Status: offline
quote:

ORIGINAL: patternrules

Last year at the Midwest contest at Verne's field I checked Andrews temp just as the plane stopped rolling and it was just at ambiant + 2 or 3 degrees, but the longer it sit there the hotter it got. Whitin a couple of minutes it was up to (and I'm working from memory 6 months old) top of 130 to 140 degrees. So to me if you run a proven setup the temps in the air is way cool for the motor. What I think and this is just speculation is that after the plane is stopped heat is coming back to the motor though the wiring from the batteries. Would be interesting to unplug the battery and see if the motor temps still go up, if you could do it fast enough, even better if had plugs on the ESC to motor to check. Should be noted that Andrew has ducting to put most if not all incoming air over the motor.
Steve Maxwell


Steve you always want to know the max temp the motor see's regardless if it is flying or not The magnets will be damaged if its sitting on the ground heating up or heating up in the air. You are correct that a few minutes after flying is about the highest temps that you will see.


_____________________________

Chad Northeast

(in reply to patternrules)
       Post #: 6

RE: Normal Motor Temps??? - 2/21/2006 1:55:09 AM   
patternflyr



Posts: 170
Joined: 1/16/2003
From: Griffin, GA, USA
Status: offline 		Hey Verne,

You are right! I was finally able to fly the plane yesterday. I noticed that after some short 3 minute flights (breaking in the batteries), the motor barely felt warm. However, when the motor was just run on the ground for the same period of time, it got hot (in the 130 range). I wasn't able to measure the after flight temp since my temp gun battery died.

Thanks,
Emory.

(in reply to can773)
       Post #: 7

RE: Normal Motor Temps??? - 2/22/2006 6:19:38 AM   
VerneK


 

Posts: 51
Joined: 3/7/2005
From: Livonia, MI, USA
Status: offline 		That's great news Emory, but I can't take credit for the knowledge. I read it right here or somewhere pattern related last year. As I recall, it was one of Chad's posts on experiments he was running. In any event, glad you're not chasing the heat gremlin. Those air molecules rushing around can be tough to see when you're trying to change their direction!

Verne Koester

quote:

ORIGINAL: patternflyr

Hey Verne,

You are right! I was finally able to fly the plane yesterday. I noticed that after some short 3 minute flights (breaking in the batteries), the motor barely felt warm. However, when the motor was just run on the ground for the same period of time, it got hot (in the 130 range). I wasn't able to measure the after flight temp since my temp gun battery died.

Thanks,
Emory.


(in reply to patternflyr)
       Post #: 8

RE: Normal Motor Temps??? - 2/22/2006 6:57:41 PM   
Dean Pappas


 

Posts: 175
Joined: 1/27/2004
From: South Plainfield, NJ, USA
Status: offline 		Hi Steve, Hi All,
My 15F rise was a peak temp.
regards,

(in reply to patternrules)
       Post #: 9

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