While you're waiting for a real answer:

First, I think they're cracked.  Or just blindly copying from a prior data sheet.

Second, I'm too lazy to check, but the subject of running motors at above-rated cell count has been treated in the electric section.  It's generally considered kosher for two reasons: one, because if you're governing the RPM the motor will, more or less, always see a lower voltage, and two, because electric motors can generally be run at considerably higher-than-datasheet voltages with only accelerated wear on the bearings* to show for it.

* Well, accelerated wear on the bearings and if you push it too hard bursting apart dramatically, leaving bits of motor all over the room.  A coworker of mine used to work at a motor company doing tests on their bleeding-edge product line.  For a while his job was, basically, to explode brushless motors.  You don't have to worry about this unless you go something like 2x or 3x the recommended cell count AND run the thing WOT with no prop.

The real problem we have with high RPM is not explossion, but resonance. Every motor has some rpm when the rotor resonantes. Motor of this type (ourunners) has that resonation close to our rpm. So it sometimes resonates  - you can hear it as a "metalic noise" and it will soon make free play in bearing which will lead to loud screaming at particular RPM when free play is so large that it can make such sound, but is already too late to solve it.

Dan was working on motors designed for high speed, so presumably that was dealt with.  And, to be more honest than dramatic, they were inrunners so the usual failure mode was that the magnets would come unglued from the rotor, expand into the stator, and much smoke, but little metal, would be emitted.

This is for my scale shoestring and I ordered it as it was cheap. I don't need the power control like a stunt plane. I will give a report on how it works and how long it lasts.

Hello Robert,
When we use a motor for Stunt, we are nominally running it at somewhere between 70% and 80% voltage so that it governs.
If the manufacturer says 4S and you govern it at 75% of the 5S voltage, you will be running a little less than 4S!
Don't worry.
As always, too much prop means too much current and a fried motor, but there is no news here.
Do you have a way the measure the current? I found a great clamp-on DC ammeter from Sears a while back.
How heavy and large of a ship do you plan to fly with this motor? Then I will go look at that website, just to make sure.
take care,
 Dean P.

Hello Mike,
It sure does look like an E-Flite Power 32 clone as well.
Did you have yours mounted at the nosering or was it firewall mounted?
Many motors do not tolerate Stunt use with firewall mounting.
Thanks,
  Dean P.

Dean, the mounts (bolt circle) are the same as an E-flite power 25, although the physical size is 32.  It took the place of a Plettenberg 20-16, front mounted.  I think I agree with Tim, good bearings will be an improvement.  I was going for the Kv and weight comparison.  The airplane is set up for 5S and the power 25 wouldn't hack it.  The Plett is OK, but only 710Kv (?) and heavier.  I would have gone for a Power 32 but it wouldn't fit in the allotted space.

I haven't used the Turnigy G32, but I did buy a G25 870kv(looks just like the Eflite Power 25). When I got it I found it only has 10 magnets instead of the 14 the Power 25 has. Someone with more knowledge might know what the lack of magnets will do to the motor operating characteristics. The parts are not interchangeable with the 2 motors can length is longer on the G25, and the bell ends are machined differently on the inside where they seat against the bearings.
 Bob

This is for my scale shoestring and I ordered it as it was cheap. I don't need the power control like a stunt plane. I will give a report on how it works and how long it lasts.

Thanks Robert,
 That makes sense.
  Dean

I've had E-Flite 32 bearings go south, too.

I was a front mount. The one I have on rear mount is fine. E-Flite's are odd that way. Paul Walker was telling me that he had one E-Flite 32 that has lasted more than a 100 flights and works fine. Another one, the bearing went out after 10 flights. I've had the same experience. I suppose it depends on their bearing suppliers. I changed out the one the bearings went out on and it seems to work fine again. We'll see how may flights it goes.

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Need to correct this...

quote author=Randy Powell link=topic=41057.msg423354#msg423354 date=1446575526]
I was a front mount. The one I have on rear mount is fine. E-Flite's are odd that way. Paul Walker was telling me that he had one E-Flite 32 that has lasted more than a 500 +  ( yes, 500, not 100) flights and works fine. Another one, the bearing went out after 50 ( at least 50, not 10) ( a Cobra rebearing lasted only 10 flights) flights. I've had the same experience. I suppose it depends on their bearing suppliers. I changed out the one the bearings went out on and it seems to work fine again. We'll see how may flights it goes.
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