Jabiru Aircraft
Pilot Operating Handbook
Model J170-D
JP-FM-13
Revision:
0
1
2
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4
28 Feb 2020
Page 4-42
4.6.4
Taxiing
Positive control is available to the pilot when taxiing the J170 due to the direct linkage type
nosewheel steering. Care should be exercised in strong winds, particularly in quartering tail wind
conditions. As with any high wing configuration aircraft, appropriate elevator and aileron control
positions are essential during taxiing operations particularly during strong tail wind conditions.
Taxiing over loose gravel or stones should be done at low engine RPM to minimise propeller
damage.
4.6.5
Engine Management
– Ground Running
The 2200 engine fitted to the J170-D is cooled by air flowing over the engine and oil cooler. During
ground running care must be taken to ensure that there is adequate airflow and that safe engine
temperatures are maintained. The guidelines presented below will assist in controlling
temperatures.
•
Minimise ground running times
– especially in hot weather
3
.
•
Carry out as many checks as possible before starting the engine.
•
Always carry out engine run-up tests with the aircraft pointing into wind.
•
In hot weather, after performing run-up checks, leave the aircraft pointing into wind and
idling at 1200rpm for 30 seconds to aid cooling.
•
If the aircraft is required to wait
– such as for runway clearance – temperatures must be
monitored, and if they approach ground running limits (listed in Section 2 of this flight
manual & displayed as yellow markings on engine gauges) the aircraft must be turned
into wind or shut down to prevent any further temperature increase.
•
Wind must be coming from within approximately 45° of the aircraft heading to be effective
in aiding engine cooling.
•
If there is no wind or low wind the engine must be shut down if ground-running
temperature limits are reached.
4.6.6
Warm Up
Most of the warm up will have occurred during taxiing and whilst conducting the Before Take-Off
checks. The engine is warm enough for take-off when the cylinder head and oil temperatures are
in the green arcs.
Ignition System Check
The magneto check should be made at 2000 RPM as indicated by the tachometer with the
carburettor heat set to COLD. Select the LEFT ignition OFF and note the RPM drop, return to
BOTH until the engine regains speed. Select RIGHT ignition OFF and note the RPM drop, return
to BOTH. Drop in RPM should not exceed 100 RPM. Do not operate on a single ignition source
3
30°C and above
