Jabiru Aircraft
SECTION 6
Model J160-C
WEIGHT AND BALANCE
JP-FM-06
Revision:
0
1
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1 Dec 2008
Page 6-3
6.1.1
Aircraft Weighing Procedures
1.
Preparation
(a) Drain all fuel from the aircraft using the fuel drain points as required to ensure that
all
the fuel
is removed, including that in the sump tank.
(b) Service engine oil as required to obtain a normal full indication.
(c) Raise flaps to the fully retracted position.
(d) Place all control surfaces in a neutral position.
(e) Ensure that any equipment, loose items etc. that are not considered to be part of the
aircraft are removed.
2.
Jacking and Levelling
NOTE
The following procedure assumes that a conventional aircraft weighing kit
utilising individual electronic wheel load pads under each wheel is used to
weigh the aircraft. If such a system is not available appropriate variations
to the procedures will be required.
(a) Roll or lift the aircraft onto the weighing pads.
(b) Chock the wheels to prevent the aircraft from rolling. DO NOT use the park brake as
this can lead to inaccurate readings.
(c) Level the aircraft. Use light packers under wheels to change the aircraft’s attitude.
NOTE
The aircraft’s longitudinal level datum is the lower rim of the pilot’s side door frame.
3.
Weighing
With the aircraft level, record the weight shown for each
wheel making any adjustments
required for zero error or cell calibration.
4.
Measuring
With the aircraft still level, drop a plumb bob from the leading edge of the right wing to the
ground. Drop a second plumb bob from the right wing. Both plumb lines must be approximately
300mm (1 foot) outboard of the main wheels. Use a string line or chalk line to mark a straight line
between the points placed above.
Measure from this line to each of the main wheels and to both sides of the nose wheel. Note that
the nose wheel distances are taken as negative for the purposes of calculation.
5.
Calculation
Use the weights and the measurement obtained to calculate the Empty Weight and C.G. The
sample form given in Figure 6-1 may be used to assist in correctly recording and calculating
these weights.
NOTE
Empty weight includes unusable fuel and full oil
Summary of Contents for J160-C
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