Savage Cub Australian Flight Manual © X-Air Australia 2008 Release 1.2 Page 20 of 40
Warm-Up and Functional Check
Warm-up the engine with a fast idle of 1500 - 2500 RPM until the oil temperature reaches 50
degrees C. During this phase, the cooling is insufficient due to reduced airflow. It is therefore
advisable not to shorten the warm-up time by running the engine at higher RPM. The aircraft
should be pointed into wind to allow additional cooling air. As soon as the oil reaches 50° C, it
is possible to do the run-up.
Before Takeoff
1
Brakes
CHECK
2
Cabin Doors
CLOSED & LATCHED
3
Flight Controls
FREE & CORRECT
4
Flight instruments
SET
5
Fuel Shutoff Valve
ON
6
Elevator Trim
NEUTRAL
7
Flaps
SET FOR TAKEOFF
8
Ignition Check
Throttle to 4000 RPM
Hold this engine speed for 10 seconds.
Switch OFF No. 1 Ignition and watch for RPM drop.
Switch ON the No. 1 Ignition & switch OFF the No. 2
Ignition watching for the RPM drop.
RPM drop should not exceed 200 RPM on either
system.
If drop is excessive, shut down & determine the reason.
Switch No. 2 Ignition ON.
NOTE
During the check with one system only, the inactive sparkplugs may tend to load up slightly.
To clean plugs, run the engine with both ignitions for a few seconds, then recheck the second
system.
9
Power Check
Throttle to 5500 RPM
Open the throttle fully & slowly to check the maximum
RPM being produced.
Wind conditions may effect, but as an average 5500
RPM should be seen.
NOTE
If the RPM is found to be more than 300 RPM lower than normal, the engine should be
examined to determine the reason.
10
Idle Check
Throttle to idle position & check that the engine runs
smoothly.
With too low an idle speed, or rough running, the cause
must be located & corrected to avoid the potential for an
in-flight stoppage
11
Carburettor Heat Check
(if applicable)
Throttle up to 4000 RPM
Pull out the Carburettor Heat Control & look for an RPM
drop.
Return the Carburettor Heat Control to the Full IN or
cold position.
