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12-24-2015 10:10 PM  3 years ago
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GREG MORGAN

rrNovice

MILLEDGEVILLE GA LAKE SINCLAIR

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Pitch setting 3GX
Using Align 3gx on 700DFC can use use servo travel limits in transmitter to achieve equal positive and negative pitch I have tried mechanical and best I get is 13+ 11.5_
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12-24-2015 10:19 PM  3 years ago
JuanRodriguez

rrProfessor

The Villages, Florida

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What that says is that your mechanical setup is not right.....servo arms need to be 90 degrees to the push rods and the push rods need to be equal length..... set everything up mechanically to achieve 0 degrees at 50% stick and then adjust your + and - settings using your swash mix.......Been there, done that and old enough to know better.....
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12-25-2015 03:46 AM  3 years ago
dkshema

rrMaster

Cedar Rapids, IA

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Make certain that you are doing all this initial setup in the 3GX "DIR" mode, where the gyros are not in the loop, and your transmitter commands are going direct to the servos.

And yes, it appears you have something wrong in the basic mechanical setup.

Give yourself a pitch curve that goes 0 - 50 - 50 - 50 - 100.

Place the collective ANYWHERE in that 50 - 50 - 50 flat spot. Here is where you set all your servo arms correctly, where you set the swashplate to be level, and where you set zero degrees pitch. Moving from the 0 to the 100 ends of the pitch curve you should be able to see your overall positive and negative collective travel, and this is where you're looking for equal amounts of positive and negative, with zero pitch at mid-stick.
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Dave

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