PatternFlyer

My Feedback: (182)

Does anyone know how many poles on the motor? Horizon Products Support has no idea.
Any recommended settings on the 85HV?
I am running 2 of 4S 5000mAh TP Extreme, but the highest power that I got out was 1350Watt with APC 17 x10E around 44 peak amp.
Larger props don't help, but worsen the result. Defective motor?
Thanks,

IP

DaveFlynn

With 8S, try an APC 16x12 pattern prop.

PatternFlyer

My Feedback: (182)

Dave,

Thank you for the reply.  Any specific reason that you are suggesting the 16x12 Pattern Prop? 

You mean the glow prop right?  I've tried 17x10N on the setup, but it got around 1100 watts.

Ihncheol

DaveFlynn

Yes, the glow prop.  Or, you could add another 4S pack to make a 12S.  You'd be over current on the ground, but you'd have lots of speed in the air.

PatternFlyer

My Feedback: (182)

David,

Are you confusing the motor with some other motor? Or did I say something incorrectly? Motor is equavalant to 4-stroke 90 ~ 110.

I am trying to figure out the problem that the setup is producing  way too low power compared to what it supposed to.  Either ESC or Motor.

http://www.horizonhobby.com/Products...odID=EFLM4110A

Here is a link to another Inspire 90 build thread with E-Flite Power 110 which shows 1800Watts at 65amp.

http://www.rcgroups.com/forums/showthread.php?t=708283

Ihncheol

DaveFlynn

I know the motor, comparing it to a .110 glow engine is at low rpm torque.  In the real world the performance is closer to a good hot .60 or maybe a average .90.  If you plot the rpm vs amps the curve will break at about 45 amps.  So to get 2000 watts of useful power you'll need enough volts to get 2000 watts at 45 amps.

PatternFlyer

My Feedback: (182)

Then, how do other guys get 1800 watts off the setup on 8S?

Am I missing something?

DaveFlynn

I don't know that you're missing anything.  What RPM do you get on that 17x10E at 44 amps?  Is it about 8500?  Then you can do the test again with each advance setting on the esc.  At the lowest advance the esc may be making the motor hot above half throttle.  Is the motor or esc getting hot?  The esc shouldn't get hot, the motor can after a 2-3 min run.

PatternFlyer

My Feedback: (182)

David,

I only get 6500 ~ 6700rpm  44amp was the peak which dropped to around 40amp.

Nothing gets hot at all not even warm after about 2 minutes.  I will try again tomorrow and see what happens.  I ran most of the testings with Micro eLogger.  I even tried to add watt-meter with eLogger to verify the output.

This my first large e-power setup but so far I hates it.

Will let you know tomorrow after running longer.

Thanks,

Ihncheol

Walt Thyng

My Feedback: (9)

Incheol,

I read somewhere that if you short any two leads from an outrunner together you will be able to feel each pole.  Just mark your starting point and count "stops" until you get back to the start.

Also, most manufacturers (or vendors) overstate the capability of their motors and many of the guys you see written up are pushing their systems to the absolute limit.   The stated wattage and amp draw is often only obtained on very fresh batteries of the highest quality and only for 4 or 5 seconds.  by the way, the type of battery DOES make a BIG difference.
Walt

Chris Moon

My Feedback: (8)

Ihncheol:

We need to know your controller settings for the 85HV.  There is a big performance difference with setting changes.  Also, always run fixed end points and be sure the controller LED comes on at full throttle to confirm it is running at full throttle.

PatternFlyer

My Feedback: (182)

I tried again with packs fresh off the charger Extreme V2 2 x 4S5000 packs.

85HV setting

Brake Delay: No Delay
Brake Ramp: Slow
Cutoff Voltage: 264
Current Limiting: Normal (*)
Brake Strength: 0
Throttle Type: Airplane: Fixed Endpoints
Motor Timing: Low Advance
Cutoff Type: Soft Cutoff
Motor Start Power: 39
PWM Rate: 13khz (*)
Direction: Forward (*)
Hex55: 85
Governor Gain: 0
Spool-Up Speed: 0
Throttle Response: 5

Peak watts 1664 at 56.53amps with lowest pack voltage 28.74V. Not sure how the rpm sensor messed up initially, but it looks like I am getting somewhere around 7500rpm minimal?

Motor doesn't turn from the idle position. Stick has to be near half throttle before the motor start turning (trim all the way down). It also screeches during the initial start (slowly throttling up). That causes the mis reading of the RPM at the beginning. How do I remove it?

Also for the packs do I have so-so packs? Should I try contacting the TP?

I also tried medium/standard advance timing which got lower output.

Should I try larger prop? I have 18x8E, 18x10E, 18x12E

Charts shows 1 minute run.

Ihncheol

Chris Moon

My Feedback: (8)

You probably want to try a lower frequency setting.  8khz is good for big outrunners. Long static runs are of limited value as it does not replicate a normal flight and stresses the system - especially the batteries.  Your best info will be from just flying it and see what you have in the air.  Numbers in flight often differ quite a bit from static numbers.

PatternFlyer

My Feedback: (182)

13Khz is the lowest setting on 85HV.  I plan on trying on a 18" prop tomorrow and see what happens.  If the output increases at least 200 watts, I will fly the setup tomorrow evening.

Thanks,,

Ihncheol

DaveFlynn

Looks like that's about all you can expect from that motor with 8 cells.  It should start better, try a higher "Motor Start Power".