Jabiru Aircraft
Pilot Operating Handbook
Model J170-D
JP-FM-13
Revision:
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28 Feb 2020
Page 4-43
for an extended period; a few seconds is usually sufficient to check RPM drop and will minimise
spark plug fouling.
4.6.7
Take-Off
Power Check
Full throttle runups over loose gravel are especially harmful to the propeller and should be avoided.
When take-offs must be made from a gravel surface, it is very important that the throttle be
advanced slowly and a rolling start take-off technique be used to minimise propeller damage.
It is important to check full throttle engine performance early in the take-off run. Any sign of rough
engine operation or sluggish acceleration is good cause for discontinuing the take-off and
conducting a full power runup to confirm normal engine operation prior to the next take-off attempt.
Wing Flap and Power Settings
Normal take-offs are accomplished at full throttle, and TAKE-OFF flap selected. The flaps should
not be retracted until a safe height is achieved and all obstacles have been cleared. Take-offs
may be made with flaps up but this will increase the take-off distance and will result in a more
pronounced nose up attitude at lift off.
4.6.8
Climb
Enroute climb
Enroute climbs are performed with flaps up, full throttle, and at speeds 5 to 10 knots higher than
the best rate of climb speed. This provides better engine cooling with little loss of climb
performance.
4.6.9
Cruise
The power setting and cruising altitude are the two major factors that will affect the cruising speed
and range of the J170. Other influencing factors include the weight and loading, temperature and
equipment installed in a given aircraft. The power setting normally used for cruise is
2800-2850
rpm
. Power settings below this will result in increased range and endurance corresponding with
the reduced fuel consumption. At a power setting of 45% the J170 is capable of attaining an
endurance of close to 13 hours, for a range of over 1000 nautical miles. For efficient and
economical operation as well as to achieve maximum engine service life the engine must always
be operated in accordance with the procedures and specifications set out in the Jabiru engine
manuals.
.
4.6.10
Stalls
In any attitude or under any loading condition there is no natural stall warning. An artificial stall
warning horn is set to activate 5 to 10 KIAS above the stall speed in any configuration. All controls
