Setting the knobs on top of the Transmitter

Posted by JD:

"Simply put the right knob sets where you lift off like, 1/3, mid or 2/3 throttle stick input. The left stick sets how much the pitch changes as you move the throttle stick.

I like to set the right knob where my heli is just about to lift at mid stick and one more click lifts it.

the left knob adjusts how smooth you lift and come back down.

I always suggest unplugging the motors and turning on the heli and spin each of the knobs left and then right looking at throttle off, mid throttle and full throttle for each of the four settings leaving the knob your not testing at 12:00 (straight up). Then you will see what they do. So you would limit the travel with the left knob if you are jumping up to fast. Anyway start at straight up on both. Then set your lift off point then adjust the left knob, to make the heli go up and down smoothly (normally should be between 10 O'clock and 2 O'clock.

JD"

Replacing Servos?

Posted by NY_Rebel:

"If you replace servos with other than the stock servo there are a few things you should know.
1. Keep all three servos the same (same brand and part #). The reason for this is, servos of different makes and/or part #'s move at different rates and since collective moves all three servos in unison, any difference in movement will drastically affect the flight characteristics.
2. Almost all the servos on the market move in the opposite direction from the stock servo.

Now, if you go with other than stock walkera servos there are two ways this can be fixed.
One way is to disassemble the servo and change the wires on the pot. This is described in detail elsewhere in this thread. Do a thread search and you should be able to find it. You only need to do this on the elevator servo, since the aileron servos can be manipulated to move either direction...

To accomplish servo movement reversing without fear of decimating your brand new servos...simply swap sides on the aileron servos mounting position (move the wires on the Rx is easier if servos are already in holder).
The elevator servo is also easy to manipulate, reverse the position of the servo mount on the main frame, mount the servo with it's shaft on the opposite side and then flip the #1 dip on the Tx to get the correct directional movement. See pic below that shows new servo mount orintation.

You may find some of the info in this thread beneficial when reversing the servos by changing their mount orintation. Post #2 has info about servos. http://www.rcuniverse.com/forum/m_5398512/tm.htm "

Cyclics & Pitch

Posted by JD:

"Cyclic Controls - Those controls which affect the helicopter's attitude in two directions namely rolling left and right (known as the aileron control) and moving the nose up and down (known as the elevator control). Confusingly, on an aeroplane, the elevator is said to control the 'pitch' of the aircraft. For this reason, with model helicopters we simply refer to the elevator so that it is not confused with the pitch of the main rotor blades


Pitch - More correctly called Collective Pitch, with helicopters this normally refers to the angle of the main rotor blades. Positive pitch creates lift. (Negative pitch creates lift if you are flying upside down.)

The glossary of terms is in TREX Tuning.

JD"