Operating Manual
UL
POWER
UL260i UL260i
F
UL260i
S
UL260i
SA
MO 260A01 Revision No: 6
Date:
2014-09-15
Page: 18 of 22
Prior to take-off
Warming up period:
Start warming up period with engine running between 1200 and 1500 rpm, duration depending on
ambient temperature, until:
oil temperature reaches at least 40°C (105°F)
cylinder head temperatures are not less than 50°C (125°F)
Attention
: Always check temperatures and pressures are within limits.
Idle speed:
When warm, engine can be set at idle speed.
Note:
Although engine idle speeds of 700 rpm can be obtained, we recommend the ground idle to
be at least 850 rpm for smooth running.
Throttle response:
When ready for take-off do a short full throttle ground test. No irregularities may occur.
Note:
Check with aircraft/propeller operating handbook, since engine speed depends on the
propeller used.
Ignition test:
The engine is equipped with double redundant ignition. Switch off one ignition coil at the time and
verify that engine remains operation normally on both ignition coils separately.
RPM difference between running with coil 1, with coil 2 or both may not exceed 5% of nominal RPM.
Take-off
Climbing with the engine at maximum take-off power (3300 rpm @ full throttle) is permitted during
a time period of max. 5 minutes.
Depending on propeller setting take-off power at 2800 rpm @ full throttle is permitted with no time
limitation.
Attention
: Observe that all temperatures and pressures remain within limits at all times. If
CHT’s exceed maximum, reduce power.
Cruise
Set power as required.
Attention
: Respect operating limits at all times.
Avoid operating with oil temperature below normal operation (80-100°C / 175-212°F), as low
operating temperatures may not eliminate any accumulated water in the engine. The formation and
presence of condensation water in the lubrication system badly influences the oil quality.
Engine shut-down
Shut down engine by switching off power to ECU before eventually cutting off fuel/ignition.
Normally the cooling down of the engine during the descent and taxiing will be sufficient to allow
the engine being shut-down (by switching the ignition off) as soon as the aircraft has stopped.
