From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Two graphs illustrating oil pressure drop and recovery during braking and acceleration under various test conditions.
| Identifier | ExFiles\Box 83\1\ scan0429 | |
| Date | 23th March 1937 | |
| 23-3-37 Oil Pressure Drop and Recovery 6BIV Top Graph: Light Braking to Rest Acceleration Through Gears Oil Pressure lbs □" @ 100°C Secs (80) (40) Direct pipe and Filter without Element [No Failure] Filler with and Without Element and Direct Pipe [No Failure] (20) (40) (60) Filler with Element Bottom Graph: Medium Braking to Rest Acceleration Through Gears Maximum Braking to Rest Acceleration Through Gears (80) (40) (20) (40) 4000 RPM 2nd Gear Direct Pipe (60) (79) 4000 RPM 3rd Gear Filler with or without Element Figures thus (60) Show approximate speed in M.P.H. | ||