BS 2M 41:1977

This standard BS 2M 41:1977 Methods of numbering propulsion units and components and describing their direction of rotation is classified in these ICS categories:

• 49.050 Aerospace engines and propulsion systems

This International Standard specifies the methods of numbering aircraft engines, engine cylinders and combustion chambers, on drawings, for example, and the methods of describing the direction of rotation of main shafts and rotors and of propellers.