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weav01 · 05-21-2014, 06:01 PM

I have several helis but my small walkera v400 is my practice bird. I want to put a different FBL unit on and need to know some specifics. The tail of my 400 is brushless motor driven. Does anyone know here whether the rudder signal out of a v-bar, 3gx, tarot, ......etc FBL will drive a brushless tail motor? Currently the stock walkera rx2614 that is a gyro and rx drives the tail motor on the rudder channel.

My goal is to maybe get this helicopter onto my DX8 with all my other helis
Thanks for any advice.

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sdunne · 05-21-2014, 06:10 PM

No it wont!
The signals coming out are a pulse to tell a servo where to position it self. They do not drive a motor.

sdunne · 05-21-2014, 06:11 PM

A brushless tail motor would need a speed controller between the signal and it.

weav01 · 05-21-2014, 08:50 PM

So. It currently does have a brushless speed controller on the rudder channel with the stock walkera FBL unit. Do you think that controller is putting out a pulsed signal like a high end FBL unit and the speed controller is converting it into a motor signal?

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sdunne · 05-22-2014, 02:47 AM

Possibly; but you need to know is the signal protocol, frequency and center point compatible.
Safest to measure with a scope.
I guess you could try plug an old servo "that you don't mind destroying" into the existing unit where the speed controller connects and see if it controls it. There is a risk of the white smoke and total destruction of the electronics.

05-21-2014, 06:01 PM	#1 (permalink)
weav01 Registered Users Join Date: Jul 2012 Location: Virginia Beach	General FBL unit question I have several helis but my small walkera v400 is my practice bird. I want to put a different FBL unit on and need to know some specifics. The tail of my 400 is brushless motor driven. Does anyone know here whether the rudder signal out of a v-bar, 3gx, tarot, ......etc FBL will drive a brushless tail motor? Currently the stock walkera rx2614 that is a gyro and rx drives the tail motor on the rudder channel. My goal is to maybe get this helicopter onto my DX8 with all my other helis Thanks for any advice. Sent from my iPad using Tapatalk HD

05-21-2014, 08:50 PM	#4 (permalink)
weav01 Registered Users Thread Starter Join Date: Jul 2012 Location: Virginia Beach	General FBL unit question So. It currently does have a brushless speed controller on the rudder channel with the stock walkera FBL unit. Do you think that controller is putting out a pulsed signal like a high end FBL unit and the speed controller is converting it into a motor signal? Sent from my iPad using Tapatalk HD

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05-21-2014, 06:10 PM	#2 (permalink)
sdunne Registered Users Join Date: Feb 2011	No it wont! The signals coming out are a pulse to tell a servo where to position it self. They do not drive a motor.

05-21-2014, 06:11 PM	#3 (permalink)
sdunne Registered Users Join Date: Feb 2011	A brushless tail motor would need a speed controller between the signal and it.

05-22-2014, 02:47 AM	#5 (permalink)
sdunne Registered Users Join Date: Feb 2011	Possibly; but you need to know is the signal protocol, frequency and center point compatible. Safest to measure with a scope. I guess you could try plug an old servo "that you don't mind destroying" into the existing unit where the speed controller connects and see if it controls it. There is a risk of the white smoke and total destruction of the electronics.

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