E-flite Ultra Micro 4-Site BNF - Manual (Page 12)

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Dual Rates and Expo
E-flite recommends using a DSM2 radio capable of dual rates and expo. The settings
below are recommended starting settings for intermediate and advanced pilots.
E-flite does not recommend that a beginner pilot fly the 4-Site. After initial flights, the
settings should be adjusted according to the style and tastes of the pilot.
Intermediate 3D Pilots
Dual Rates High Low Expo High Low
Aileron 60% 40% Aileron 25% 15%
Elevator 65% 50% Elevator 25% 10%
Rudder 60% 50% Rudder 30% 20%
Advanced 3D Pilots
Dual Rates High Low Expo High Low
Aileron 100% 60% Aileron 30% 20%
Elevator 100% 65% Elevator 30% 20%
Rudder 100% 60% Rudder 35% 25%
Note: Do not set your transmitter ATV over 100%. If the ATV is set over 100%, it is
possible to overdrive the servo and cause damage to the servo.
Setting CG
Center of Gravity: Start at a location of 40mm back from the leading edge of
the top wing at the center of the fuselage. The 4-Site’s CG can be adjusted
forward and aft of this recommended setting according to your flying style.
The easiest way to check the CG of the 4-Site is by using a small screwdriver
to balance the airplane at the CG location.
Receiver Control Unit Description, Arming
and Motor Control Test
The Spektrum AR6400L installed on your 4-Site is a lightweight combination
of main motor electronic speed control, servos and Spektrum DSM2
compatible receiver. The receiver unit is also equipped with a status indicator
LED. Please refer to the instruction manual of the AR6400L for more
information on the unique features and programming options.
The following checklist contains the steps you must follow to ensure proper
arming and operation of the receiver unit, as well as proper motor response:
• Before each flight you should ALWAYS turn the transmitter on before
connecting the flight battery to the receiver unit. Never connect the flight
battery to the receiver unit before powering the transmitter on first. After
each flight, be sure that you always disconnect the flight bat tery from the
receiver unit before powering the transmitter off.
Note: The only time you should connect the flight battery to the receiver
unit before powering the transmitter on is when you are binding the
receiver to the transmitter. Please see the Transmitter and Receiver
Binding section of this manual for more information.
• The throttle stick MUST be set in the lowest possible position, and, for
most transmitters, the throttle trim must also be set to the lowest possible
position in order for the receiver unit to arm. If this is the first test flight, or
a test flight following repairs, you should also center the rudder, aileron and
elevator trims.
• When the status LED on the AR6400L becomes solid red, the receiver unit
is initialized and ready for flight. Also, as long as you had the throttle stick
in the idle position and the throttle trim in the lowest position during the
initialization process, the ESC/motor will now be armed. Use caution as the
propeller will now spin with throttle stick input.
Note: If the status LED of the AR6400L does not become solid red, please
review the following:
• If after blinking red, the status LED becomes solid red, but you have no
control of the motor, you have a positive Radio Frequency (RF) link between
the transmitter and receiver, but the throttle stick and throttle trim may not
be set to the correct positions. Check to be sure that the throttle stick is in
the lowest possible position, and that the throttle trim is set to the middle
or a lower-than-the-middle position. If you now have control of the motor,