Freewing MiG-21 User Manual page 7

Servo installation instructions
Install main wing servos
1.Use servo tester or radio to center the
servo.
2.Use glue to install the servo and aileron
horn on the main wing.
3.Buckle the servo cable to the through,
after installed all the servos, stick on
the decal.
4.One side pushrod insert to the servo
arm, adjust its length. And insert the
clevis to the aileron horn.
5.Repeat the above four steps, install the
other side main wing servo and flap servo.
Install elevator servos
1.Use servo tester or radio to center the
servo arm.
2.Use glue to fix servo on the elevator
servo mount .
3.One side pushrod insert to the servo
arm, adjust its length. And insert the
clevis to the aileron horn.
4.Repeat the above steps to install on
the other side servo.
Install rudder servos
1.Use servo tester or radio to center the servo
arm.
2.Use glue to fix the servo and servo arm on
the rudder.(Refer to the right photo)
3.Press the servo cable on the servo cable
trough.
4.After glue solidify, connect the pushrod to
servo and servo arm.
Aileron pushrod size
90mm
(3-1/2")
Flap pushrod size
80mm
(3-1/8")
Elevator pushrod size
Pushrod diameter Ø1 .5m m
158mm
(6-1/4")
Rudder pushrod size
58mm
(2-5/16")
MIG-21MF FISHBED
Item No.:FJ210
A - 9g servo
B - Main wing pushrod
C - Aileron horn
D - Main wing servo trough
D
A - 9g servo
B - Elevator horn
C - Elevator pushrod
A - 9g servo
B - Rudder horn
C - Rudder pushrod
Pushrod diameter Ø1.5mm
Pushrod diameter Ø1.5mm
Pushrod diameter Ø1 .5 mm
A
B
A
Aileron pushrod mounting hole
1
2
3
Flap pushrod mounting hole
1
2
3
Elevator pushrod mounting hole
1
2
3
Rudder pushrod mounting hole
1
2
3
B
C
C
A
C
B
1
2
3
1
2
3
1
2
3
1
2
3
6