5) Prior To Take-Off - Rotax 912 series Operator's Manual

10.3.5) Prior to take-off

Warming up period:
Start warming up period at 2000 r.p.m. for approx. 2 minutes,
continue at 2500 r.p.m., duration depending on ambient
temperature, until oil temperature reaches 50° C (120° F).
— Check temperatures and pressures.
Throttle response:
— Short full throttle ground test (consult Aircraft Operator's
Ignition check:
Check the two ignition circuits at 4000 r.p.m. (approx. 1700 r.p.m.
propeller).
— Speed drop with only one ignition circuit must not exceed 300
— 120 r.p.m. (approx. 50 r.p.m. propeller) max. difference of
Check of hydraulic propeller governor:
Check control of the hydraulic propeller governor to specifications
of the manufacturer.
Effectivity: 912 Serie
OM initial issue
Manual since engine speed depends on the propeller used).
ATTENTION: After a full-load ground test allow a short cooling
run to prevent vapour formation in the cylinder
head.
r.p.m. (approx. 130 r.p.m. propeller).
speed by use of either circuit, A or B.
NOTE: The propeller speed depends on the actual
reduction ratio.
AIRCRAFT ENGINES
page 10 - 17
July 01/98