Trex 800 hv with Lipo 2s, no bec

[1340]

So I understand correctly, the rx battery needs to power the 2 inputs on the rx ( I have the Gpro in my kit ) because of the amperage draw?
So 1 battery needs the y harness, or 2 batteries plug directly into the 2 rx inputs?
Do I have that right?
Thanks.

[Bonkievan]

1x 2S batt with two servo wires into the FBL. If you are worried about redundancy, use an Optiguard.
I did.

[1340]

Originally Posted by Bonkievan

1x 2S batt with two servo wires into the FBL.

Not really worried about redundancy.
Just want to make sure I have a big enough battery.

[ah_liang]

I had a friend whom crash his heli becos one cell in his 2s pack went dead in flight. He nows fly with a 3s pack with a bec.

[Bonkievan]

Originally Posted by ah_liang

I had a friend whom crash his heli becos one cell in his 2s pack went dead in flight. He nows fly with a 3s pack with a bec.

Yep, and that's why I use an Optiguard if the a bec or Rx batt fails completely

[alexis007]

Originally Posted by Bonkievan

Yep, and that's why I use an Optiguard if the a bec or Rx batt fails completely

May I ask what specific Optiguard are you using?

[Bonkievan]

Originally Posted by alexis007

May I ask what specific Optiguard are you using?

Sure. The Ultra Guard 430 Super Combo (incl LED)is what I used.
I believe there is newer version now, but the above worked very well on both my 800 and 700.

[alexis007]

Originally Posted by Bonkievan

Sure. The Ultra Guard 430 Super Combo (incl LED)is what I used.
I believe there is newer version now, but the above worked very well on both my 800 and 700.

Thank You for the information. I need one for my 800 size heli.

[Woodsta888]

Originally Posted by buto

All I just picked up a used (like new) T-Rex 800 E with the stock 120 HV Esc (Castle) and stock HV servos.
I am planning on using Spektrum AR7200BX for flybarless and recevier with a sat. I have read all of the above posts and picked up the y harness and a Pulse 2s 5000mah to power the electronics. My question is what do I need to do in the ESC programming. I do have the Caste link set up and software already. I have a Pulse stick 65c (2) 5000 MAH to power the motor. Please let me know if anything does not sound correct. Better to ask than cook something. I will want to run it at a low head speed until I get comfortable with it.

\if the heli was used with the same motor then you probably dont need to change anything as far as settings go if previous owner flew it successfully, but you'll need to recalibrate the throttle to your Tx to show where 0-100% is then set some flat curves.

If you are running lowe headspeed you'll want an ESC with freewheel, not sure about Castle ESC's.

[sethb]

I think i will get the ultra guard 430 for my 800 does it just plug into my gpro and thats it. sounds great.