Blackhawk PC-9 NOT ENOUGH POWER

[rman1sr]

I bought the blackhorse PC9 from Motion RC and bought it with the recommended bundle.The plane weighs 9.9 pounds. I'm using a 6s 5200 battery.

Motor is an admiral 6320kv and 120amp esc., from ZTW.
prop 16 x 10 this is what they recommended

Max wattage I can get is 625 watts on a 97% battery.

Tried a 17 x 12 prop and my wattage went down to 505 watts max
ESC is setup correctly.

tried 8s setup and only get 707 watts

Any help would be appreciated.

[Evan D]

I believe their set up should be a 8S set up not 6S. If you want 6S you will need a much higher kV motor but the best thing would be to add a 2S in series for 8S.

BTW the numbers you have are wrong, it would be Admiral GP20 6320-295Kv Brushless Motor...

Interesting your Wattage went down with a bigger prop???

[rman1sr]

Thank you for that I tried to edit my submission to correct the motor number but luck. Yes it is a 6320 motor

[timmybeetle]

Hi

it's a blackhorse and not blackhawk, confused me.
6s no wat with that motor, 8s minimum as stated on website Blackhorse PC-9

• For 8S setup TWO 4 Cell 14.8V 5000 mAh LiPo Batteries with EC5 connector - we recommend TWO Admiral Pro 5000mAh 4S 14.8V 60C LiPo Batteries with EC5 Connector

and here should be more info

https://www.hobbysquawk.com/forum/rc-airplanes/civil-general-aviation-light-sport/194517-official-black-horse-pilatus-pc-9-1840mm-arf-discussion-thread

regards hanso

[rman1sr]

Tried 8s setup still not enough wattage draw only 719 watts.

[timmybeetle]

Tried 8s setup still not enough wattage draw only 719 watts.

Hello

1. did you calibrated throttle into ESC???

2. maybe LIPO is not performing???

some info: 8S lipo fully charged is 8 x4.2V = 33.6V but there is some lost so 8 x 4V =32 V
Motor is 295Kv so ideal RPM of prop = 9440, so that should work!
in your case you are not getting max power, so there is something else going wrong in your setup!

[Evan D]

It's something big that's not right. He should be pulling 2300+ Watts. Really he needs a experienced set of eyes to look at his whole set up. The batteries, connections, the series connector, how the Wattmeter is hooked up, programing, ESC calibration, etc...

[Twowingtj]

Also, make sure that the 2 to 1 EC5 adapter is a "series" and not a "parallel".

[timmybeetle]

Posted this link before but did not work hope thus one will,

https://www.hobbysquawk.com/forum/rc-airplanes/rc-propeller-airplanes/194517-official-black-horse-pilatus-pc-9-1840mm-arf-discussion-thread

grts Hans

[timmybeetle]

Pilot from https://www.hobbysquawk.com/forum/rc...wer#post379083

Would be nice if you could give us fellow pilots an update with yours progress......
Otherwise in Dutch we say de duif is dood..... ( the pigeon is dead )

kind regards Hans