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HomeAircraftHelicopterBeginners Corner › Tail Servo!!!
03-06-2012 06:37 AM  6 years agoPost 1
NLDIRENZO

rrApprentice

New York

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Thank God for the beginners corner on RR cause I would be lost without it!

I have been watching a few videos about setting up your tail servo I have set up 3 Helis now with little problems but my question is after you plug inthe esc and tail servo and bind the heli to the radio the tail servo centers I get that but now when you attach the servo horn and rod does the pitch slider on the tail have to be centered or does it not matter?

Did you mean to do that? Yeah its called a crash landing its a new trick

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03-06-2012 06:54 AM  6 years agoPost 2
Santiago P

rrProfessor

South West, Ohio

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Servo centered
Servo arm 90degrees to the link
tail pitch at center.

It all matters when you want a good working setup.

santiago

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03-06-2012 07:02 AM  6 years agoPost 3
ticedoff8

rrKey Veteran

Morgan Hill, CA. USA

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Here comes the can of worms.

Personally, I will set up the mechanics so that I have a right angle between the servo arm and the rod, then a right angle with the tail-rotor control arm and the rod with the slider in the center of its travel.

Then, use the gyro to set the total left/right travel of the slider. Most gyro will allow you to maximize left/right travel independently to match the geometry of the linkage.

Then, I will set the gyro into "rate" mode (not AVCS or heading hold) and bring your heli up to a hover. Now, adjust the length of the rod until the heli will hold its heading in a hover - no drifting right or left. On the helis that have the servo mounted on th tailboom, just slide the servo front of back.
Don't set the sub-trim on the radio - leave it at 0.
This process will make the slider "off center", but it will set the "aerodynamic" center of travel.

Then you can set the gyro back to AVCS (heading hold) and set your piro rate with the "servo travel" limits on your radio. It it piros fast to the left, then reduce the left travel volume (or visa-versa).

So, effectively, you are going to end up with the slider off center.

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03-06-2012 02:58 PM  6 years agoPost 4
Santiago P

rrProfessor

South West, Ohio

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So, effectively, you are going to end up with the slider off center.
That depends on the helicopter. Most of the better designs ends up with very good tail trim with the tail pitch slider close to center.
Then there are slight variations due to tail blade size, and more important, tail rotor rpm.

I do a "dirty" check on the tail by swinging the blades together and looking for about 1/2" between the tips, or roughly 12degrees. Then I look to see if that puts the slider close to center.

Don't sweat it if is not exactly at center, is just a good starting point during setup.

santiago

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03-06-2012 05:58 PM  6 years agoPost 5
NLDIRENZO

rrApprentice

New York

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Thanks for all the tips

Did you mean to do that? Yeah its called a crash landing its a new trick

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