3.
Horizontal tail unit
Before rigging, the leading edge cap fairing
on
the elevator must
be
opened and the
enclosed wing nut assembly pulled forwards. Balance the tailplane
on
the top of the
fin
.
Stand behind the fin/rudder and lift the elevator to maximum
up
deflection. Connect the
elevator
control
rod
to the connecting ball
on
the elevator. Test for security of the
connection. Now
align the bearings
in
the tailplane with the three pins on the top of the
fin
and push the tailplane backward to engage the pins.
To
secure the tailplane engage
the thread
on
the wing nut assembly and rotate clockwise. Tighten until there
is
no
free
play
on
the tailplane. The tailplane leading edge cap fairing locks the wing nut. If
necessary tighten or loosen the wing nut by % turn
so
that the cap can
be
closed.
Disassembly
is
achieved
by
reversing the order of the instructions above,
by
turning
the wing nut
anti-clockwise until
it
can
be
pulled clear of the thread, easing the tailplane
forward off the pins, then disconnecting the control connector.
4.
Checks after rigging
1. Check the four ring locks
on
the wing fuselage spigots are
in
the locked
position.
2.
Check the aileron and airbrake control connections are secure (see page 19 for
description of check method).
3. Check the operating
load and correct function of the cable releases.
4. Check the tyre pressure and operation of the wheel brake.
5.
Check the tailplane for any free play
in
the elevator/fin seating.
6. Check the elevator and rudder operation.
5.
Checks before take-off
1. Have
all
controls free and full movement?
2. Are the airbrakes
locked in?
3.
Is
the undercarriage handle
in
the forward position and engaged
in
the lock
notch towards the fuselage side panel?
4.
Is
the trim position correct?
5.
Is
the canopy locked?
6. Are the seat belts and parachute harness fastened and tight?
7.
Is
the altimeter set to field altitude or ZERO?
8.
Is
the radio switched
on
and set to the airfield frequency?
20
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