Freewing MIG-21 FISHBED User Manual page 7

Servo Installation Instructions
Flap and Aileron Servo Installation
1.Use a servo tester or radio to center the
servo.
2.Use glue to install the servos and control
horns to the main wing.
3.Feed the servo cables through the trough,
after all the cables are in place, apply the
decal over the trough.
4.Feed one end of the pushrod into the
aileron servo arm and adjust its length.
Snap the clevis to the aileron control
horn's ball link.
5.Feed one end of the pushrod into the
flap servo arm and adjust its length.
Snap the clevis to the flap control
horn's ball link.
6.Repeat the above four steps for the
other aileron and flap servo.
Elevator Servo Installation
Use a servo tester or radio to center
1.
the servo arm.
Use glue to intall the servos on the
2.
elevator servo mounts.
3.Feed one end of the pushrod into the
servo arm and adjust its length. Snap
the clevis to the elevator control horn's
ball link.
4.Repeat the above steps to install
the servo on the opposite side.
Rudder Servo Installation
1. Use a servo tester or radio to center
the servo arm.
2. Use glue to install the servo to the
Horizontal Stabilizer and the control horn
to the rudder.
3. Feed the servo cables into the trough.
4. Feed one end of the pushrod into the
servo arm and adjust its length. Snap
the clevis to the rudder control horn's ball
link.
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. 5m m
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