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Blade 400 › 3D Limiting Tail Servo Throw in One Direction?
03-05-2008 11:30 PM  10 years agoPost 1
Wolfpackin

rrApprentice

Avon, CO

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In order to get my tail to hold, no yaw, I need the pitch slider, when the servo has centered, halfway between center and the tail box (3/4 from the grips). I believe this is due to the decreased thrust of the rotors at my altitude, 8,000FASL.

With this setup I've been able to get the stock gyro to hold really well with no drift.
But my main concern is that I am over driving the tail servo with right rudder input since it is already way over to that side.

Is the correct way to limit the servo throw to lower Trav. Adj. in that direction?
I know that lowering the Dual Rate would limit throw in both directions but I'm not sure if Trav. Adj. is the right thing to try.

What say you?

Thanks.

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03-05-2008 11:35 PM  10 years agoPost 2
Dood

rrProfessor

Wescanson

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Is the correct way to limit the servo throw to lower Trav. Adj. in that direction?
I know that lowering the Dual Rate would limit throw in both directions but I'm not sure if Trav. Adj. is the right thing to try.
Travel adjust on the gyro gain channel changes gyro gain
travel adjust on the rudder channel changes piro rate.
Neither of which affect servo travel.

There is (should be) a travel adjust pot on the gyro. Thats the only thing that will affect servo travel.
Flip your gain switch on the tx to put the gyro in rate mode, and adjust the limit pot accordingly so the servo isnt binding.

After all that, set up your linkage so the heli flies with no tail drift in rate mode.
Then you're done.

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03-06-2008 12:05 AM  10 years agoPost 3
Wolfpackin

rrApprentice

Avon, CO

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I don't think there is a travel adjust pot on the gyro, just a gain pot.

So, adjusting the Trav Adj on the rudder channel does not effect servo throw? Then how does it effect the piro rate, what changes?
I never quite understood that.

Thanks.

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03-23-2008 02:57 PM  10 years agoPost 4
supra6

rrApprentice

Singapore

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Off set servo horn
Found this off the trex site (don't go arggggggg! use what works)

http://www.trextuning.com/modern-gyros.php

Seems the idea is to find the sweet spot in normal hover then off set the horn on the tail servo slightly towards the frame so as to maintain full servo throw but yet no eletrical input durring hover, seems to be the idea of getting the mech porition of the heli set up as close as possible with no trims or endpoint settings then use them to controll rates and such for advanced flying.

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