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AEROSHELL FLUID 1 AeroShell Fluid 1 is a light lubricating mineral oil containing, by specification, less than 0.10% mass stearic acid. APPLICATIONS For use as a lubricant where a light anti-freezing oil is required, e.g. on aircraft instruments, gun mounting buffers, hydraulic couplings, controls, door hinges, etc. Also used as a preservative oil for Stromberg carburettors and some fuel systems. AeroShell Turbine Oil 3 can be used as an alternative to AeroShell Fluid 1, but AeroShell Fluid 1 must never be used as an alternative to AeroShell Turbine Oil 3. PROPERTIES DEF STAN 91-44 TYPICAL Oil type Mineral Mineral Kinematic viscosity mm 2 /s @ −25°C 1250 max 1140 @ 40°C 12 min 12.15 Flashpoint Pensky Martin Closed Cup °C 144 min 150 Pourpoint °C −45 min Below −45 SPECIFICATIONS U.S. – Aniline point °C 85 min 87 Aniline point change after extraction with sulphuric acid °C 5.5 max 2.2 228 Other Fluids British Approved DEF STAN 91-44 French Equivalent to AIR 3515/B Russian – NATO Code O-134 Joint Service Designation OM-13 Total acidity mgKOH/g 0.3 max 0.15 Ash %m 0.01 max Less than 0.01 Density @15°C kg/l – 0.873 Trace element content Must pass Passes Copper corrosion 3 hrs @ 100°C Must pass Passes A viscosity/temperature curve is shown at the end of this section. Other Fluids 229 www.shell.com/aviation The AeroShell Book Edition 18 2003
AEROSHELL FLUID 3 AeroShell Fluid 3 is a general purpose mineral lubricating oil recommended for general lubrication of aircraft parts that require a light oil with good low temperature characteristics and a low freezing point. It is inhibited against oxidation and corrosion. AeroShell Fluid 3 is a relatively low viscosity product with good resistance to evaporation. APPLICATIONS PROPERTIES MIL-PRF-7870C TYPICAL Oil type – Mineral Kinematic viscosity mm 2 /s @ 38°C 10 min 10.0 @ −40°C 4000 max Less than 4000 AeroShell Fluid 3 is recommended for general lubrication of aircraft parts that require a light oil, e.g. hinges, pivot joints, shaft joints, linkage pins and bearings, pulleys, cables, camera mechanisms, radio and radar gear and instruments. AeroShell Fluid 3 is normally applied by means of an oil can or brush. For this reason it is also described as ‘an oilcan lubricant’. Flashpoint Cleveland Open Cup °C 130 min 155 Pourpoint °C −57 max Below −57 Operating temperature range of AeroShell Fluid 3 is -54°C to +121°C. Evaporation @ 99°C, 22hrs %m 25 max 13 230 Other Fluids For high temperature applications where no provision is made for frequent re-lubrication the synthetic oil, AeroShell Fluid 12, should be used in place of the mineral oil, AeroShell Fluid 3; however in this case care should be taken to ensure that there is no incompatibility between AeroShell Fluid 12 and seals, paints etc. SPECIFICATIONS U.S. Approved MIL-PRF-7870C British Approved DEF STAN 91-47 French – Russian – NATO Code O-142 Total acid number mgKOH/g – 0.3 Relative Density @ 15.6/15.6°C – 0.89 Low temperature stability 72 hrs @ −54°C Must pass Passes Oxidation & corrosion stability 168 hrs @ 121°C – metal weight change Must pass Passes – viscosity change % −5 to +20 10 – acid number change mgKOH/g 0.2 max 0.02 Corrosivity Must pass Passes ASTM colour – < 0.5 Other Fluids 231 Joint Service Designation OM-12 A viscosity/temperature curve is shown at the end of this section. www.shell.com/aviation The AeroShell Book Edition 18 2003
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