Prior To Take-Off; Warming Up Period; Throttle Response; Ignition Check - Rotax 914 Series Operator's Manual

3.5) Prior to take-off

Safety
Warming up peri-
od

Throttle response

Ignition check

Propeller gover-
nor
Effectivity: 914 Series
OM Edition 2 / Rev. 0
WARNING WARNU
Step
1 Start warming up period at approx. 2000 rpm for approx. 2
minutes.
2 Continue at 2500 rpm, duration depending on ambient
temperature, until oil temperature reaches 50 °C (120 °F).
3 Check temperatures and pressures.
NOTICE
WARNUNG
Step
1 Short full throttle ground test (consult Aircraft Operators
Manual since engine speed depends on the propeller
used).
Check the two ignition circuits at 4000 rpm (approx. 1700 rpm pro-
peller).
Step
1 Speed drop with only one ignition circuit must not exceed
300 rpm (approx. 130 rpm propeller).
2 115 rpm (approx. 50 rpm propeller) max. difference of
speed by use of either circuit, A or B.
NOTE:
Check of hydraulic propeller governor:
Check control of the hydraulic propeller governor to specifications
of the manufacturer.
NOTE: Cycling the propeller governor puts a relatively
high load on the engine. Unnecessary cycling or
additional checks should be avoided.
BRP-Powertrain
Non-compliance can result in serious injuries
or death!
Do not take the engine into operation if any
person is near the aircraft.
Procedure
After a full-load ground test allow a short cool-
ing run to prevent vapour formation in the cyl-
inder head.
Procedure
Procedure
The propeller speed depends on
the actual reduction ratio.
page 3-9
April 01/2010