- What are dual rates
Dual rates offered on most 6 channel and above transmitters is the ability to control the amount of total travel of the servo. This is controlled by a switch on the transmitter. Flip the switch one way and get low rate or less surface travel. Flip the switch the other way and yot get high rate or more surface travel. Some people use dual rates for landing or when test flying a new aircraft.
- What is exponential
Exponential is the ability to change the response of the servo. Exponential allows the use of full movement of the sufaces but with a softer response around neutral stick yet when the stick is moved to its extreme full suface travel is available. Exponential is setup differently on some transmitters Futaba uses a negative percentage to soften the stick around neutral while JR uses a positive percent. Be careful when you set this up as using a positive percent on a Futaba transmitter will make the aircraft more sensitive at neutral stick.
- Mixing
Mixing is the ability to control two or more channels with one stick function. The most common of these is to mix rudder in with ailerons to make coordinated turns. In this scenario the aileron channel would be the master and the rudder would be the slave so that when the aileron stick is moved the rudder moves as well. The rudder stick is still active and can overide the aileron stick. Mixing can be very useful when using two sevos on the same surface, to mix in a little elevator for knife edge flight, or flaps.
- What are ATV's
ATV"S or adjustable travel volume allows fine tuning of the total amount of servo travel. Surface travel should be mechanically adjusted first and then fine tuned with the ATV function.
- What is sub trim
Sub trim is the ability to fine tune the position of the servo arm at neutral. This is useful if you can't get the servo horn at 90 degrees to the servo or control rod. Sub trim if used should be set only if absolutly necessary because it affects the surface travel on each side of the stick differently.
- Aileron differential
Aileron differential is the ability to have more up travel than down travel on the ailerons. This helps maintain heading when ailerons are applied. When roll is applied to an aircraft it may vere to the left or right more up or less down is used to correct this loss of heading.
- What's a range check and how do I perform one
A range check is an operation that verifies the integrity of your transmitter and receiver set up. To perform a range check, do the following.
- Secure your channel on the frequency board
- Extend one length or section of you transmitter antenna
- Turn on your transmitter
- Turn on your receiver
- Walk away from your aircraft approximately 60 feet
- Operate all control surfaces and watch for any abnormalities
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