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SECTION 2
Aircraft Operating Instructions Edge XT 912
LIMITATIONS
January 2014
Issue 2.4
Page 21
2.4.3 Fuel Grades
FUEL
Preferred Fuel Type
En228 Premium/Regular. Super grade gasoline, lead free, min RON 90
Optional Fuel Type
AVGAS (see note)
Table 3 Section 2 Fuel Specification
NOTE
Due to higher lead content in AVGAS, the wear of the valve seats and deposits in the combustion
chamber will increase. Therefore, use AVGAS only if you encounter problems with vapour lock or if the
other fuel type is not available.
Use of AVGAS requires higher frequency maintenance intervals. Refer to the maintenance manual.
Refer to section 2.6.7 for fuel capacities and limitations
2.4.4 Lubricating Oil
The 912 UL engine has an external sump, and the entire system is standard to the Rotax 912 engine.
The oil specification is given in the Rotax Operators Manual, Section 10.2.3, Lubricants. In general use
only synthetic or semi synthetic oil, API classification “SF” or “SG” or later quality oils. Multigrade is
recommended. These oil types are detergent types.
Oil Capacity: 3 litres maximum, 2 litres minimum, consumption 0.06 litres/hr maximum.
Two oils, which are recommended by the Rotax Service instruction 18, UL 97 for use with both Avgas
and unleaded fuels are:
SHELL, Advance VSX 4, APISG, SAE 15W-50
VALVOLINE, Dura Blend Synthetic, APISJ, SAE 10W-40
2.4.5 Cooling System
Water-cooling system capacity is 2.5 litres. See maintenance manual for further details.
Coolant Specification
Historically, earlier Airborne trikes with Rotax 912 UL engines used high quality silicate free long life
antifreeze coolant. Then waterless propylene glycol was specified as coolant from 23rd February 2005 as
this has a higher boiling point though it results in slightly higher running temperatures.
On September 23, 2013 Rotax issued Service Instruction SI-912-016R6 that permits the use of
conventional coolant based on ethylene glycol with 50% water content.
The
912 Operators Manual (OM Edition 3 / Rev. 0 September 01-2012) .. 2.3) Operating media-
Coolant .. Conventional Coolant
states "Conventional coolant mixed with water has the advantage of a
higher specific thermal capacity than water-less coolant." and
Application
states "When correctly
applied, there is sufficient protection against vapor bubble formation, freezing or thickening of the coolant
within the operating limits. Use the coolant specified in the manufacturers documentation."
WARNING
DO NOT OPEN THE COOLING SYSTEM WHEN THE ENGINE IS HOT. SEVERE SCALDING AND
OTHER INJURIES MAY RESULT.
