Idle 1, 2 and throttle hold

[rpd617]

I understand what idle up is, but what do you use idle 2 for? And what is throttle hold.
Also how tight should the ball links on the tail rotor be? It seems like on my Knight 50 Sport that the tail servo would never really zero itself and was always buzzing like it was still trying to move. The linkage to the tail wasn't binding but seemed be a little tight. If I unhook the links to the blades the push rod moves REAL easy and the slider on the tail shaft moves really easy. Just wondering if I should resize the links.
Thanks
Rick

[Leaf Blower]

Actually, expand your ideas of what you are thinking of.

A typical use will be to have either different throttle and/or pitch curves attached to the 2nd and 3rd positions.

Examples: Have Normal configured for normal position and normal pitch curves. Have 2 configured for normal 3 D with a throttle curve of 100,90,80,90,100 and #2 configured with a throttle curve of 100,100,100,100,100 for ultimate 3-D experience.

A learner might go with a linear throttle curve for lower headspeed on normal. For windier days, have idle up 1 configured for the same pitch curves, but rather than linear for the throttle, have it configured as 0,35,60,85,100 or 0,40,65,85,100 to make the machine more stable under windy conditions or just to give it a higher headspeed. Then have idle up 2 configured for 3d.

It's for whatever you want it configured as.

[Leaf Blower]

Is it buzzing or moving. with Heading Hold gyro's, you might hear the servo working as you move the tail, and that is normal. And in HH, it does not center - which I am assuming you meant by it zeroing itself. Take the ball link off the rod, and put it on the ball and check it by itself. If it does not turn freely, consider replacing it, or push it on and off several times to see if that loosens it up. If it does not free up, then consider resizing the links.

However, if the ball link is free moving, check your alignment of the servo, and the throw as well. Put the gyro in rate mode, and it should be centered at 90 degrees. Move the rudder left/right and check for binding. If you have the ball out too far on the servo arm, it could cause binding during movement.
The servo being in a bad position might also cause binding- say horizontal rather than vertically mounted...

You might also try some plastic safe lubricant on the ball as a last resort- but i'd guess that the throw of the servo is not in alignment with the rod- or it is just the ball too far out on the arm.