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HomeRC & Power✈️Aircraft🚁HelicopterFlybarless Rotor Head SystemsV-Bar › Protos FBL geometry
03-30-2010 08:06 PM  10 years ago
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psych-lick

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Portland, OR

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Protos FBL geometry
After watching Mr.Mel's setup videos I realized the servo arms are too long on my carbon Protos.

Using the stock fbl conversion, I've noticed that +/-17 degrees collective is possible, cyclic will bind the swash against the main shaft and the servo arms will bind against the frame for aileron and pitch servos at full deflection top and bottom.

It would appear as though the solution would be to shorten the servo arms. However, with the servos set deep in the frame the links will hit the top of the frame at full deflection.

To work around this, I guess you could cut the frame on each side so that the link will not hit. I'm afraid to weaken the frame by doing this. Has anyone done it? What were your results?

I would imagine using a metal servo holder at the top will help strengthen the frame.

The vbar is setup with the following:
Collective is 13.5 degrees at 72. Cyclic ring is 60.
Online calculator says to set the gain to 85.
-Jeff T.
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03-30-2010 08:26 PM  10 years ago
MrMel

rrProfessor

Gotland

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Drop OICU812 a PM, I know he has setup a Protos recently.Gone fishing..or hunting..or something
My site: http://heli.dacsa.net - VBar videos and more
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03-30-2010 10:24 PM  10 years ago
Pulento

rrVeteran

CHILE

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Try enlarging outer swash balls.

Mine isn´t FBL but I did it using JRs ball spacers since the Protos has poor servo resolution.

That will modify Cyclic Gain also:

http://www.vstabi.info/en/node/75

http://www.vstabi.info/de/node/76
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HomeRC & Power✈️Aircraft🚁HelicopterFlybarless Rotor Head SystemsV-Bar › Protos FBL geometry
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