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Old Nov 10, 2009, 06:31 AM
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justy g's Avatar
Hong Kong
Joined Jan 2007
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Turnigy motor smoked first run!

Hi

I have this motor by Turnigy http://www.hobbycity.com/hobbycity/s...r_Eq:_AXi_2826. I ran it on a plush 40 a esc today and the motor smoked after about 30 secs at half throttle pulling about 18 amps on 11*7 prop.

Are all electric motors this unreliable?Or is just Turnigy? Any recommendations for a reliable electric motor/esc combination?Is it a case you get what you pay for!

Thanks

Jus
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Old Nov 10, 2009, 06:36 AM
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vintage1's Avatar
East Anglia, UK
Joined Sep 2002
29,703 Posts
That shouldn't have happened. If it really was only pulling 18A.

or was that 18A at half throttle? that's a different kettle.

You don't say what pack..
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Old Nov 10, 2009, 06:42 AM
7000mw of raw power!
rich smith's Avatar
New Hampshire (not the old one)
Joined Dec 2006
5,987 Posts
Prop recommendations from these guys are rarely safe and you chose one that was even worse.
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Old Nov 10, 2009, 07:03 AM
I am ready for HHAEFI!!
powerlines's Avatar
United States, GA, Cochran
Joined Apr 2004
6,573 Posts
OH.. I am the only one this happened to TWICE..
Crap motors.. Big and Small.. the Magnet can came loose from the bell housing on mine. Started Grinding .. Then Bigg fire ball came out of the ESC..

Thanks TURDugy!!!!

OH. Yea.. Don't even think about emailing them.. NO Help at all.. I will keep my $ in the USA!!

Motrolfly, Reaper, Scorpion!!!! They ROCK!!
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Old Nov 10, 2009, 07:50 AM
7000mw of raw power!
rich smith's Avatar
New Hampshire (not the old one)
Joined Dec 2006
5,987 Posts
MY COUNTRY 'Tis of Thee.... sweet land of.... (fades off)

BTW those motors are from china. And will burn out if you put too big a prop on them too.
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Old Nov 10, 2009, 08:36 AM
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justy g's Avatar
Hong Kong
Joined Jan 2007
719 Posts
Ok Guys...Its Scorpion time!! Turdigy.... ROTFL
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Old Nov 10, 2009, 09:07 AM
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vintage1's Avatar
East Anglia, UK
Joined Sep 2002
29,703 Posts
we've supplied dozens of turnigy's no problem. But then we do test them first,, and supply our own ratings based on actual experience, rather than random numbers from the Chinese national lottery draw.


You cant bash the manufacturer if the distributor indulges in fantasy, and you cant bash the manufacturer if you overload their motors, either.

If that was pulling 18A at half throttle, it would have been likley to be around 54A at full, which is total overload. Even by hobbycity's standards. It might well have been pulling peak currents of over 60A at half throttle, too.

You still didn't say what pack you had it connected too, either.
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Old Nov 10, 2009, 12:41 PM
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Omaha Nebraska
Joined Apr 2008
320 Posts
What cell count was the battery, if you were using a 11x7 I think 4s 14.8V would be the max and probably would pull 60 plus amps on 5s 18.5V
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Old Nov 10, 2009, 03:07 PM
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Fourdan's Avatar
Antony (France)
Joined Sep 2003
2,965 Posts
Quote:
Originally Posted by justy g View Post
Hi

I have this motor by Turnigy http://www.hobbycity.com/hobbycity/s...r_Eq:_AXi_2826. I ran it on a plush 40 a esc today and the motor smoked after about 30 secs at half throttle pulling about 18 amps on 11*7 prop.

Are all electric motors this unreliable?Or is just Turnigy? Any recommendations for a reliable electric motor/esc combination?Is it a case you get what you pay for!

Thanks

Jus
Hi Jus
Your Turnigy is in the class "Kv 900 rpm/V wght 163g"
On 4S with an APC 11x7E it is overpropped
But I don't know if you are 3S or 4S (?)

You could compare using Scorpion Calc freeware
SII 3020-890 (I measured Kv 865 rpm/V on my sample), wght 166 g
On APC 11x7E that Scorpion consumed 42A on 4S = 623 W
The ratio is 3.75 W/g very high for Kv 865

Suppose your Turnigy is 920 rpm/V (generally HC is announcing lower Kv than real) it's normal to smoke it or to smoke your 40A ESC or both
Louis.
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Old Nov 10, 2009, 03:47 PM
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justy g's Avatar
Hong Kong
Joined Jan 2007
719 Posts
Running a 4s1p 20c 3000mah battery, 11x7 folding prop, 40 a esc.
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Old Nov 10, 2009, 04:09 PM
Space Coast USA
hoppy's Avatar
Space Coast
Joined Oct 2000
20,946 Posts
What brand and type of prop?
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Old Nov 10, 2009, 04:10 PM
**** 37130 ****
RobC(UK)'s Avatar
Joined Aug 2007
1,781 Posts
FYI

Turnigy 3548 900kV with 11 X 7 APC E.

That's 920W for 61A.
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Old Nov 10, 2009, 06:24 PM
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miche's Avatar
Joined Oct 2008
473 Posts
I have same motor TR35-48-B-900kv, Aeronaut prop 11x8, , Hyperion g3 4S lipo batt.35/65C, ave. 50amp, power between 700 and 800 watt, max. burst 7 sec., no problem yet.
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Old Nov 10, 2009, 07:13 PM
uhhh....this thing on?
skyking1231's Avatar
Long Island, NY USA
Joined May 2005
1,655 Posts
could have just been a 'bad' motor.
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Old Nov 11, 2009, 12:07 AM
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justy g's Avatar
Hong Kong
Joined Jan 2007
719 Posts
Quote:
Originally Posted by miche View Post
I have same motor TR35-48-B-900kv, Aeronaut prop 11x8, , Hyperion g3 4S lipo batt.35/65C, ave. 50amp, power between 700 and 800 watt, max. burst 7 sec., no problem yet.
So by going by this set up i was not using too big a prop.. or was I?

I just want a reliable setup using an Aeronaut 11x7 folding prop and Flightmax Zippy 4s1p 3000 mah battery...any recommendations of a proven design would be welcome.

Its to go in a ASW 28 glider 2.5m auw approx 2400g

Thanks

Jus
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