![background image](http://html1.mh-extra.com/html/jabiru/j120/j120_technical-manual_3130523139.webp)
Aircraft Service Manual
Jabiru Aircraft
Pty Ltd
JTM001-1
J120, J160, J170, J200/J400, J230/J430, J250/J450 Variants
REVISION
1
Dated: Nov 2011
Issued By: SW
Page: 139 of 233
11.2 CONTROL COLUMN
11.2.1 DESCRIPTION
The same control panel is used for the elevator as for the ailerons. Drawings of the system are given
in Section 9.
A central shaft is located between the crew seats. The control column is mounted at the fwd end of
this shaft via a pivot.
11.2.2 REMOVAL AND INSTALLATION
Refer to the details given in Section 9.
11.3 ELEVATOR
11.3.1 DESCRIPTION
The elevator comprises a Rigid Cellular Polystyrene core moulded and bonded to a composite skin
and embodying a composite control horn at the centre. An elevator trim system is attached
– refer to
Section 11.6.
Note that some models (J170-C, J230, J250 families etc) use a wider-span horizontal tail and
elevator than the J160. This elevator is driven by the same control assembly as the J160.
11.3.2 REMOVAL & INSTALLATION
1.
Remove ventral fin from under tail to expose control cables etc.
2.
Unbolt cable from control horn.
3.
Unbolt trim linkage from control horn.
4.
Loosen screws in hinge pin retainers and lift hinge pin retainers from hinge pins. It is not
necessary to remove these parts.
5.
Remove hinge pins.
6.
Remove Elevator.
7.
Reverse the preceding steps for installation.
11.3.3 ELEVATOR BALANCING
The J160/J170 Elevator is balanced during construction. A standard weight of 750 grams of lead is
placed in each control horn to balance the elevator. In service there should be no reason to
rebalance the elevator.
For the J160-C, balance may be checked with the control fitted to the aircraft & the control & trim
removed. Measure the force at the trailing edge required to keep the elevator level. Weight & hinge
moment values are given below:
-
Weight
4600g
+/- 100g
-
Hinge Moment
259000g.mm
+/- 4000g.mm
11.3.4 INSPECTION AND REPAIR
Inspect elevator for any signs of delamination or cracking. Pay particular attention to the Control
Horn and hinges and their surrounding areas.
Inspect the front underside of the elevator for any signs of rubbing against the horizontal stabiliser at
full down deflection: when the elevator hinge is pressed down using thumb pressure there should be
clearance between the elevator and the stabiliser. Also refer to Section 4.17.
Repairs must be referred to Jabiru Aircraft Pty Ltd or our approved local agent.
11.3.5 INSTALLATION
Reverse the preceding steps for installation.