Need advices for Electric Setup

[Hueyman86]

Hello guys,

I recently picked up my old dream : the Hirobo UH-1B Huey from 1983. Powered by a 20xx HGE-20EH Petrol engine, I obviously wanted electrify it ( since I fly with electrons, I don't want to hear or smell any fueled thing ever )

I plan to use original Hirobo Main Gear Box, which has a ratio of 9 : 1

Planned headspeed is 1000 RPM rock solid +/- 10% for headroom for adjustments.

I'll use the Kontronik Heli Jive 120A from another chopper. The main question is regarding the choice of the motor, LiPos and gear ratio ( well, everything ahah )

I was thinking about using the Pyro 750 in 560 Kv ( 4500 W ) or maybe it's little brother, the Pyro 700 in 520 Kv ( 3000 W )

My goals are :

- Low headspeed ( 1000 RPM )
- Great Flight Time
- Running 6S

That's probably where there is a problem, I don't think I could run 6S on that setup. Actually I could but with a ridiculous autonomy.

That's why I also consider obtaining a different gear ratio with other gears to have a much faster spinning rotor and so lower torque and Current.

Here are two screenshots of the online eCalc I use.





Any input from you experts much appreciated.

Cheers !
Hueyman

[Hueyman86]

???

Surprised not to have any answers from all the electrons experts here

Cheers !
Hueyman