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HelicopterHIROBOOther › set up question on equal atv
09-07-2009 12:14 AM  8 years agoPost 1
datidun

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N Ireland

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had a discussion with a couple of guys about equal travel adjustement on elev and aileron ,for example if both sides on aile our set on 100 percent on the radio and cyclic pitch is checked the result being one side is 8 degrees the other 6 degrees ,,is it right to say they can be corrected by the radio ,on one heli i have 100 atv on one side 85 on the other but the cyclic is perfect 8 degrees on both sides ,all,the rodes and links are the same size and correct lengh ,so why dont i get equal pitch on both sides when both atv are set at 100,swash dead level heli flyes great ,just curious thanx

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09-07-2009 01:01 AM  8 years agoPost 2
synodontis

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United Kingdom

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are you sure your servos are "centered" properly at mid stick? there is a geometrical discrepancy somewhere and you have to find it. either that or some part is not the right dimension etc. . . highly unlikely.

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09-07-2009 01:36 AM  8 years agoPost 3
Dr.Ben

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Richmond, VA, USA

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All intermediate bellcranks must be geometrically matched to each other as well.

And..........

Assuming there is no subtrim in the system or anything else to shift the neutral point of the servo (even though the arm is on there at a 90D angle), the only other two things that I can suggest to account for your situation are the servo itself which has inherent assymetrical travel left and right of neutral OR the radio is out of calibration for full over stick commands left versus right. Another servo will tell you about the former possibility. It would take a trip to the service center to confirm the other one.

Ben Minor

Team Synergy Team Futaba Team Kontronik USA
Progressive RC

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09-08-2009 12:41 AM  8 years agoPost 4
ttrip06

rrApprentice

Central Pa

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Did you make sure the blade was straight in the grip before checking your pitch??

Pop the links off the blade grip and move the blade in the grip till it will sit level on it own. then snug a little reconnect the links and check your pitch again.

Tim

Tim Tripoli

Team Futaba, Rail Blades
Team Crash
ProggressiveRC

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09-08-2009 09:39 AM  8 years agoPost 5
datidun

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N Ireland

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thanx for the replies will check that ,im sure sub trim is the culprit as sometimes no matter how you turn the servo horn on the servo wheel it doesnt match perfect 90 degrees ,so thats why sub trim has been added to get perfect 90 degrees ,does it really matter i mean the way it flies ,it has been corrected on the radio ,like for ail is 100 travel adj left and right is 85 percent ,but the cylic pitch is 8 degrees equal on both sides

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09-08-2009 09:47 AM  8 years agoPost 6
Lewd Skywalker

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Manila, Philippines

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I suggest you use servo wheels, so if you can't get that 90D without going to subtrim, you can just measure and make your own hole on the wheel.

I just don't know if other brands make servo wheels for their servos like Futabas.

SDX FBL | Eagle3 SWM | Trex 600EFL Pro

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09-08-2009 03:52 PM  8 years agoPost 7
datidun

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N Ireland

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my cylic servos are jr

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09-08-2009 06:18 PM  8 years agoPost 8
Dr.Ben

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Richmond, VA, USA

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Correct Ludwig. If there is subtrim in the system, all bets are off on getting equal throw in both directions. JR has wheels that will work for this application.

Ben Minor

Team Synergy Team Futaba Team Kontronik USA
Progressive RC

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HelicopterHIROBOOther › set up question on equal atv
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