Lubricants used in the power trains of helicopter transmissions have required standard tests, such as ASTM-designated methods, definitizing required physical and chemical properties. These initial properties and their subsequent service life variations or degradations, whether causation is internal or external, affect service performance. In order to advance the state-of-the-art lubricant performance predications, tests in the regimes of friction, wear, high-pressure viscosity, particulate contamination and others are now part of standard practice techniques available. Along with these tests, a third generation chemical characterization technique has now been developed which is fast, efficient, accurate, and requires only milligram sample amounts with a minimum of processing. This technique yields accurate compositional data of ester-type lubricants and some antioxidant additives. Other metal-type additives are determined by a combination of Infrared Spectroscopy and boiling point distribution by gas chromatography. (Author)
Advanced chemical characterization and physical properties of eleven lubricants
Fortgeschrittene chemische Charakterisierung und physikalische Eigenschaften von elf Schmierstoffen
US Government Reports ; Mar ; 1-137
1983
137 Seiten
Report
English
The Chemical and Physical Properties of Aerospace Grade Lubricants
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