Sounds like two different kv's question is WHICH is correct, could be the "slow" motor is correct and the "fast" motor is the outlying outrunner?

Go to "Set RPM" mode and the differences will vanish...

Dennis,

I was using the set RPM mode but when I switched to the hubin FM9 it was suggested that gov high mode was what I wanted with the Ice Lite 50. Maybe I will give it a try.

Hello Tim,
If the question does not resolve with this last test you said you'd try ... let me suggest going back to first principles.
Take the ESC out of governor mode and back to fixed-throttle mode.
Run the motors up with an RC TX and verify or disprove the Kv difference, or a QC issue that makes the motors different. Even a small prop will do for this test.
Then it will be safe to go back to the governor and compare.

There is supposed to be a new revision of the 32 which has been optimised for the new E-Pylon.
My buddies in NEPRO (Northeast Pylon Racing Org) are not happy with the too heavily wing loaded ships being proposed.
Dean

Dean,
as one who is involved with the EF-1 program, they are a bit overloaded compared to other pylon racers, but they fly great! My main point of contention is that the wont hold knife edge in the corners, and they are to slow,, but they are VERY cool looking planes
the Eflight motor that is targeted and approved is the 1250 KV .25 motor, not the 32,, just to prevent confusion

Hi Mark,
Glad to hear that folks are happy, but you gotta' talk to the NEPRO guys!
Keep me informed, would you?
Dean

One answer to all my problems is to just fun 5 cells, which is what Dean and Bob and several others have told me I should really being doing anyway with a 770 KV motor on the APC 13 - 4.5. I tried a 5 cell on the one in question and it had more than enough RPMs, I was just trying to figure why it would not perform on the batteries I was using when the other 32 did.

This season batteries will be five cell for sure, just not ready to buy next seasons batteries

The E-flight motor they are selling for EF-1 is the Power 25 1250Kv.  The Power 32 is being sold with the new Sundowner 25 ARF.

Tim-- That is a very interesting problem.  Running (2) of the same motors in set rpm mode should yield the same result with the same batteries.  We have run a Rim-Fire 35-36-1200, Rim-Fire 35-30-1250, & Turnigy 28-36-1000 on using the same ESC settings with the same results in the same airframe on the same prop.  The variance was motor temperature as the larger motor ran cooler, but that is the expected result.  Performance was very similar @ the handle.  The in-flight data did show a difference as obviously the larger motor maintained rpm better or with less effort.

Check your motor connections for bad solder joints and possibly check for termination issues in the can.  The wires could be shorting on the can if the heat shrink has pulled away.  The E-Flight motors are nicely built.  +/- 5% to 10% on Kv from motor to motor can be expected.  That shouldn't however effect the set rpm mode result.        

Archie Adamisin
Muncie, Indiana

Archie, Tim,

I am not trying the set RPM mode yet, I have been running on Gov High mode. I will try the set RPM mode, on the FM9 Timer, do you set the same RPM on the box or does the set RPM on the Castle over ride the programming box??

Tim,

I am pretty close to the RPM limit with the 4S I am currently running, so if 5-10% variance is normal then that could be part of the problem, I cant program in any more cause I just cant get to it with the 4S pack. When I ran the 5S I was easily getting more RPM than I needed so I would need to reduce the RPM's......unless I was using set RPM mode I guess.

Thanks for all of the input, my problem right now if the lack of day light to try any of these fixes. The florescent lights in my shop and tachs don't mix 

Hmm let me think,, propeller spinning at 10000 rpm,, tach in close proximity,, flashlight balanced precariously close to said propeller,, and hands close to propeller,, all in the dark,, yeah, not such a good idea me thinks,,