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Normal Motor Temps???
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. |
RE: Normal Motor Temps???
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 |
RE: Normal Motor Temps???
1 Attachment(s)
Dean, Click on Reply. There is a click here to upload link on the bottom of the dialog box
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RE: Normal Motor Temps???
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 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. |
RE: Normal Motor Temps???
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 |
RE: Normal Motor Temps???
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 |
RE: Normal Motor Temps???
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. |
RE: Normal Motor Temps???
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 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. |
RE: Normal Motor Temps???
Hi Steve, Hi All,
My 15F rise was a peak temp. regards, |
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