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Home✈️Aircraft🚁Helicoptere-MikadoLogo 600 › logo 600 12S 4035-500 getting HOT---need some input
04-05-2010 12:58 AM  10 years ago
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mmc205

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PA - USA

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logo 600 12S 4035-500 getting HOT---need some input
thought i'd ask here first since this is a popular motor for logos.

I have the scorpion 4035-500 in my logo 600 running 12s 3000 hyperion g3's. i'm running the mod 1 106 tooth hear with a 12T pinion swinging 603's at 2000 rpm. performance is good, and the castle hv 45 controller and lipos are only lukewarm (110 or so) but the motor is pretty hot no matter if your hovering or doing 3D! i'd guess about 150F on the outside of the can. i'm running the latest castle firmware, and using outrunner mode and low timing (per castle's recommendation) I tried 8khz but it didn't really make a difference. performance is great but the motor being that hot makes me a bit nervous, anyone else run into this? any ideas?

oh, as far as the loading, heres's a graph. I 3D but keep it rather smooth and my average current is pretty low

thanks guys!
***Logo 600 vbar***Henseleit TDR vbar***
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04-05-2010 03:12 AM  10 years ago
CatchMyStratus

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Ohio

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I've read many reports of that motor running hot. 150F won't damage the motor. Around 200F you should start to worry. The magnets and wire are rated for very high temps. You can check this on Scorpion's specs.

I ran a motor in my 500 that would hit 180F on hot days. It ran great for many flights.
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04-05-2010 03:31 AM  10 years ago
dahld

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Bakersfield, CA, USA

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Guessing at motor temp is kinda a bad idea, especially if you end-up making changes based on data that you don't know is correct.

Before doing anything, get an accurate temp reading on the motor.

That being said, 150 F is not too hot for that motor. Now of course I like to see 125-135 instead, but that only happens with our 4035-560's on 10S when practicing required maneuvers for precision (easy 3D), and the ambient temp is 60 degrees F.

Put the ambient temp at 80 degrees F with some hard 3D, and the temps come in at the 150-170 degree range. But even at that, we're still running the same motors we had last year at this time, having routinely been operated at those temps (not withstanding a few bearing changes).

Get a thermometer and you'll know for sure. Kinda a "must have" tool for electric modelers (-:

Dave
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04-05-2010 04:28 AM  10 years ago
NTM

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Lloydminster, Alberta, Canada

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Mine runs 150 to 160 degrees.

I can tell you that your pinion size vs. head speed looks pretty wacked out.
I'm running an 11 tooth at 2200 rpm at 80% governor.
A 12 tooth got me 2260rpm at 75% governor.
I can't imagine running it at 2000 rpm on a 12 tooth, that'd be like half throttle.
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04-05-2010 07:19 AM  10 years ago
OICU812

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Edson, Alberta, Canada

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Is that correct you are running a 45hvCastle?? That's very risky man!!...Once upon a time there were Nitros, flybars and frequency pins...
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04-05-2010 12:59 PM  10 years ago
mmc205

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Dave,
I have an eagle tree with a temp gauge i'll have to slap on the bottom of the motor, your right, better not guessing.

NTM,
I don't think the pinion is that far out of line but i could be wrong. I tried an 11 tooth and it couldn't even hold 2000 rpm and the castle gov told me 2000 rpm was un-attainable. Here's my mr mel headspeed calc. I'll look into this further however because i did do the 11t test with cheapy turnigy batteries, and now i'm running hyperion g3 cx.

i did the calc for new 2009 25C cells and a 12/106 gear ratio.

Voltage for this calculation (avg):3,552/cell with a total of 42,624
Nominal voltage: Spoolup RPM 100% throttle no governor (44,4v): 2513
Avg RPM you will see with 100% throttle and no governor: 2340

Max normal bogging applied you will see RPM at: 2051
(this number should be the minimum if your motor & battery is up for the challenge)

what do you guys think, try the 11t again?

OICU,
yup, its an hv 45. I had it around and called castle after a quick test flight to check average amperage and peaks, and they told me running 12S i should be okay since i was only averaging about 27 amps. I was told that the 45 was capable of 10 second bursts to 90, and split second bursts to even higher. i'm keeping an eye on the temperature, and so far even during 65F days doing pretty decent 3D its only getting lukewarm. At first i thought it was right on the edge, but i'm starting to gain a little confidence in it. I've been told i'm crazy for using it, but i'm just trusting castle creations technical guru's right now and keeping an eye on my data logs and post flight temps. We'll see how it goes....

thanks for the reply's guys, i really appreciate it!
***Logo 600 vbar***Henseleit TDR vbar***
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04-05-2010 07:21 PM  10 years ago
NTM

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Lloydminster, Alberta, Canada

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Are you running the 35c or the 25c hyperions ?

I get 2246 rpm on an 11 tooth, at 85%, 25c hyperion packs, with MrMel's calc.
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04-05-2010 07:29 PM  10 years ago
mmc205

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PA - USA

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you mean you get that in real world or in the calc?

I might try the 11T once i actually do a proper reading on the motor temperature with my eagle tree on the 12T.
***Logo 600 vbar***Henseleit TDR vbar***
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04-05-2010 10:14 PM  10 years ago
mmc205

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PA - USA

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okay, my data logger says it peaked at 138 F after a 4 minute flight but do to contact resistance and the fact that the sensor is at the bottom of the motor, i'm guessing it could be anywhere up to 10F hotter. I'm guessing this is an okay temp, so should i not worry?***Logo 600 vbar***Henseleit TDR vbar***
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04-05-2010 10:25 PM  10 years ago
OICU812

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Edson, Alberta, Canada

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Nope that's nothing really...Once upon a time there were Nitros, flybars and frequency pins...
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04-05-2010 11:51 PM  10 years ago
NTM

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Lloydminster, Alberta, Canada

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you mean you get that in real world or in the calc?
That's on the calc with your 25c packs and a castle esc.

Personally, I'm getting 2200 rpm with an 11 tooth on the 4035-500, with turnigy 12s 40c 4000mah packs, at 80% on the jive 80 HV.
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