A20-6XL and CC P-45

[canna]

What setings should I use?
T-Rex 3s 17t pinion
Timing:
high,standard or low advance timing
PWM Switching rate:
13khz,26khz or 52khz

Motor seems to run hot in default mode.

Thanks,
CJ

[kyna]

Dear CJ,

We suggest you use the standard timing and PWM switching rate of 13khz.

What is your motor temp and what size blades and battery are you running?

Best Regards,

Kyna Veatch
Office Manager
Hacker Brushless USA

[jh4db536]

im getting very high motor and battery temps too. i used to think that outrunners run cool.

hovering and getting 6minutes of flight time. i went to low timing and it seemed to help flight duration a little. moreover, im getting TONS of power - this thing does NOT bog at all even at extreme blade angles.

Phoenix45, 3cell: tp2100 prolites 24C & Apex MK3 2200mah 15C & Maxamp 2200 15C, swinging 315mm pro wood, 2700-3000rpm between normal and idleup, high governor.

15Tooth pinion // 138Tooth maingear, so 9.2:1 gear reduction equivalent to running a 16t pinion on a Trex. i had a 14t pinion, but i didnt get to try it because my pinion broke...i am willing to sacrifice some performance to get these temps down and better flight time.

i estimate a fairly high average, but consistent, amp draw. i know my batteries arent shot and my mechanicals are perfect, i can get 15 minutes of hover with my 1105/3y all other variables equal.

================================================== =======

im going to try reducing governor gain or even experimenting with throtle curves to see if i can get this thing to run more efficiently

[n111kx]

I just hovered my Rex 3 minutes with a new 6XL (2850 headspeed, Jazz 40, TP2100) and it was hot! Of course, it was 93 degrees outside also. I hope that this motor can take it...
Kip

[T_MECO]

Just tried my motor with a CC35 and the motor wa too hot to touch. Ran a 16t pinion with 325 pro woodies. Is there an optimum setting for this motor?

[kyna]

T MECO,

Where you able to get a temp on the motor? We have been running them at 180F with no problems.

Best Regards,

Kyna Veatch
Office Manager
Hacker Brushless USA

[Ultraviolet]

Kyna, Please let me quote the Hacker Brushless Motor manual that I recieved
with my A20-6XL....... " Hacker brushless motors are designed for operating
temperatures up to 65 C ( 149 F ). Temperatures exceeding this level can lead
to motor damage and should be avoided "

It would appear that the design engineers at Hacker disagree with 180 F being an
acceptable operating temperature.

Is this motor capable of operating within its design envelope ?
If not ..... then why is it being marketed as a heli motor ?
Maybe it should be marketed specifically as a plank motor !!!

I will report back with my assessment of the Hacker A20-6XL's
suitability as a heli motor.

[n111kx]

Mine is still running great after many hot flights. I have yet to put a thermometer on it yet...
Kip

[kyna]

Ultraviolet,

These paramaters are a general rule and covers the broad spectrum of Hacker Brushless high perfomance motors.

At temperatures above this specifications current draw, load and overall performace should be closely monitored.

As with any product, our baseline parameters are a guideline and are derived at an ambient temperature of 75F. When outside temperatures are above this ambient you should add the difference.

Best Regards,

Kyna Veatch
Office Manager
Hacker Brushless USA

[n111kx]

I ran about 5 minutes of light 3D today at 96 degrees F (2950 hs). Motor temp was 141 F. Tolerable in my opinion for such a hottest day that I plan to ever fly...
Kip

[Ultraviolet]

Kyna, I have had a chance to fly the Rex with the A20-6XL for a few
weeks now. While the motor does run on the hot side, it also produces
a lot of power. I am satisfied with the overall performance.

What is the rated efficiency of this motor ?

[kyna]

Ultraviolet,

I am extremly happy to hear that you are pleased with our motor. Unfortunately, Hacker Brushless GMBH does not publish any efficiency ratings on their motors.

Best Regards,

Kyna Veatch
Office Manager
Hacker Brushless USA

[steph]

I have been running the A20 6XL motor withthe cc45 i have tried all the settings and the motor still runs very hot between 45/55c this is on a 15t pinion on a 3s setup.
This motor runs hot from spool up i mesured the temp after 1 min of flying and it was 45c
I have also tried this motor on a 4s setup @ 3000 rpm max amps 22 average amps 11 and the motor still gets hot 50/55c

My outrunner 450th motor never exceeds 30c after 10 min of flight @ 3000 rpm on 3s or 4s

What makes one motor run hotter than the next is it the quality of the motor windings or how the windings are fitted and the tolerances it is made to

[kyna]

Steph,

The A20-6XL has been running "hotter" than other motors on the market. However, the Hacker A20-6XL can be run up to 80C with no problems. The temperatures you are seeing are well with in the motors limits.

Also, the motor was made to run on 16/17T pinions and going lower actually strains the motor. In addition, we do not reccomend running this system on 4S Lipo.

Best Regards,

Kyna Veatch
Office Manager
Hacker Brushless USA

[steph]

How can a lower gear put more strain on the motor :confused:
And why don't you recomend this motor for 4s 14.8 volts

[kyna]

Steph,

The motor was not developed to handle more than 11.1V. More voltage may cause the damage to your motor system.

On 11.1V and a 15T pinion the headspeed isn't high enough, so the motor has to work harder to keep the heli in the air.

The A20-6XL in a T-Rex has been working quite well on 11.1V and a 16T/17T for more radical performance. Although it may seem hot, your temperatures indicate you are well with in the motors limitations.

Best Regards,

Kyna Veatch
Office Manager
Hacker Brushless USA

[Ultraviolet]

Steph, This motor does not run well on a 15t pinion. It really comes alive on a 16 tooth pinion. I may try the 17 tooth pinion for some real fun.