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ProModeler Scorpion Power
HelicopterMain Discussion › HV Direct Servo Setup
06-29-2017 09:51 PM  23 days agoPost 1
Ironside

Senior Heliman

Baltimore, MD

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If everything I'm using is HV, is this how I'd connect the system or would I still need a BEC?

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06-29-2017 10:00 PM  23 days agoPost 2
gologo

Key Veteran

Sedalia, Mo USA

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If your Rx/fbl unit is rated at hi-voltage along w. all your servos,
your diagram looks good....Running your 2s right into the Rx......

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06-30-2017 12:37 PM  22 days agoPost 3
Ironside

Senior Heliman

Baltimore, MD

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Thanks gologo. Everything I have is rated HV so I should be good there.

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06-30-2017 01:08 PM  22 days agoPost 4
Heli_Splatter

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USA

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Could some one explain the red wire note on the drawing. Why is that necessary.

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06-30-2017 02:18 PM  22 days agoPost 5
ssmith512

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Indianapolis, IN USA

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Could some one explain the red wire note on the drawing. Why is that necessary.
The EDGE series ESC do not have an internal BEC. ESC with an internal BEC generally require the red wire being disconnected if an external power source is being used to power the servos/RX/FBL unit. If the red (power) wire is connected with an external power source on an ESC with an internal BEC, bad things can happen, the magic smoke can be released, and you end up with a funny looking paper weight.

Steve

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06-30-2017 02:40 PM  22 days agoPost 6
Heli_Splatter

Elite Veteran

USA

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OK, so here is my thinking.... yes the Phoenix edge does not have a BEC built in to the circuitry. If it did have a BEC, you would need to remove the red wire to avoid powering the receiver from two power sources (ESC, BEC or Battery) and conflicting.

Now that there is no BEC on the Edge ESC, it should not make a difference whether you removed the red wire or left it in place. I would think that the ESC would reject any power coming from the receiver.

I have probably 10 of the CC ESCs and I have never removed the red wire unless I am creating a Multi-Rotor where only one ESC provides the control power.

Oh, and another thing. I don't think the white wire should be plugged into the receiver. It is for the governor.

What ever you do, don't cut the red wire... all the bomb tecs will tell you that.

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06-30-2017 03:03 PM  22 days agoPost 7
Ironside

Senior Heliman

Baltimore, MD

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This will actually be my first HV setup. Do you guys have an opinion on going straight 2S to the receiver (assuming all components can handle the voltage) or do you think its a better idea to run a BEC (i.e. CC BEC Pro) in between the battery and the receiver? Is there any advantage going one way or the other (again assuming all components can handle the voltage)?

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06-30-2017 03:28 PM  22 days agoPost 8
Heli_Splatter

Elite Veteran

USA

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I am currently (get it?? ) running this exact setup. I have had no control problems. I am running BeastX HV and a 8channel Spektrum receiver.

I like the setup. One thing is that you are flying one battery that can fail. Using the BEC you have to depend on flight batteries. With this system, if flight batteries fail, you might still be able to auto down and save the aircraft.

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06-30-2017 03:40 PM  22 days agoPost 9
ssmith512

Key Veteran

Indianapolis, IN USA

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I have always used 2S straight input. Have never used an external regulator.

Steve

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06-30-2017 04:37 PM  22 days agoPost 10
EEngineer

Elite Veteran

TX

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"ESC with an internal BEC generally require the red wire being disconnected if an external power source is being used to power the servos/RX/FBL unit."

On the external SBECs that I designed, as seen in "my gallery", one doesn't have to worry about the "red" power wire being disconnected.

I terminate the "red" wire into a 100k ohm resistor on the SBEC.....and then you connect the SBEC output to your RX/FBL controller as you would normally do.

The SBEC only carries ground and throttle signal from the ESC....and generates power(jumper selectable voltage) within the SBEC(referenced to ESC ground). With dual leads, if you prefer.

Makes things less complicated.....

Logo 600SXs, 700XX, 800XX

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06-30-2017 07:09 PM  22 days agoPost 11
Heli_Splatter

Elite Veteran

USA

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I once did something that has nothing to do with this topic. Would you like to see pictures of that?

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06-30-2017 09:56 PM  22 days agoPost 12
EEngineer

Elite Veteran

TX

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Me?

No thanks...but thanks for asking....

Logo 600SXs, 700XX, 800XX

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07-03-2017 03:09 PM  19 days agoPost 13
Ironside

Senior Heliman

Baltimore, MD

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Thanks for the reply fellas. Just wanted to make sure I was doing this correctly.

Also Heli_Splatter, you are correct with the white wire. I forgot to disconnect it in the diagram. I wouldn't have it plugged into the receiver. I plan on using it in the "Arm Lock" mode (if I even use it at all.) I might just disable it. I haven't decided yet.

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HelicopterMain Discussion › HV Direct Servo Setup
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