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HomeAircraftHelicopterAlignT-REX 700N › Cylic pushrods setup
04-10-2010 05:09 AM  8 years agoPost 1
Jej34

rrApprentice

N.J

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Looking for a liile help here.

I'm about to install my pushrods on the two belcranks for pitch and roll on my 700n.
I insert a 4 mm Allen through the belcrank and frame to line and lock things up.

It seems as if the belcrank balls and the servo hole are not lined up exactlly as it should. Unless I am wrong, if things are lined up correctly, I should be able to take two equal lenght pushrods and they should line up with 2 holes on the servo wheel that are not offset from each other.

It's like I would have to shorten one to be able to use symetrical holes in the servo wheel.If I cofused the he'll out of you, let me know!

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04-10-2010 05:13 AM  8 years agoPost 2
george0079

rrElite Veteran

USA

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Watch these videos. save yourself alot of headache, and answer alot of questions

http://www.helifreak.com/showthread.php?t=74703

Hell... I can fix that.
Uh oh..
Nope.
It's ***ked!!!
RE-KIT!!!!!

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04-10-2010 05:14 AM  8 years agoPost 3
cdrking

rrElite Veteran

Seattle

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Are you 100% sure your servo wheel is EXACTLY lined up so your pitch links are at EXACTLY 90 degrees to your servo ball placement? If it's off then you will have a difference in length.

Jeff

I made a small T-square to assist in linkage setup.

To hover is divine, the alternative is rather PLANE.

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04-10-2010 09:02 PM  8 years agoPost 4
Jej34

rrApprentice

N.J

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Ok, I got past that problem, it seems with the Jr servo wheels, I am going to have to put in 26 clicks of sub trim ( jr9303 ) is this too much in your guys opinion?

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04-10-2010 09:12 PM  8 years agoPost 5
z11355

rrMaster

New England

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as a new guy, you may not realize that different servo wheels (and even different positions on the servo wheel) cause the arm to be at slightly different places.

so, you may want to spin the servo wheel 90 or 180 degrees (or try a different servo wheel) and see if you can get closer so you have less subtrim.

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04-12-2010 06:17 PM  8 years agoPost 6
Andy from Sandy

rrElite Veteran

Bedfordshire, UK

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If you drilled the servo wheel yourself that could be where one error has occurred. The Align servo wheels are predrilled and will allow you to try for zero subtrim in 8 different positions.

Crucially the servo needs to be set at its mid position before fitting the servo wheel.

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