Abstract:
A lubricant suitable for all the current specifications for turbine engines for supersonic transport aircraft is based on a hindered ester (e.g. PB 520) and contains an alkylated aromatic amine antioxidant, a copper passivator, and a neutral phosphate and an amine salt of a dialkyl hydrogen phosphate as load carrying additives. Optionally the lubricant may also contain a hydrolytic stability improver, a dispersant polymer, a lead corrosion inhibitor and a dialkyl phosphite load carrying additive.
Abstract:
A LUBRICANT, ESPECIALLY FOR SUPERSONIC JET AIRCRAFT ENGINES, IS BASED ON A HINDERED ESTER AND CONTAINS A DIALKYL HYDROGEN PHOSPHATE AS A LOAD-CARRYING ADDITIVE, A COPPER PASSIVATOR AND AN AROMATIC AMINE ANTIOXIDANT. THE LUBRICANT MAY ALSO CONTAIN A LEAD CORROSION INHIBITOR AND A NEUTRAL PHOSPHATE.