Two graphs showing the variation in maximum ball pin load versus axle velocity for a Delco adjustable damper.
| Identifier | WestWitteringFiles\V\December1930-February1931\ Scan136 | |
| Date | 14th February 1931 guessed | |
| DELCO ADJUSTABLE DAMPER VARIATION IN MAX. BALL PIN LOAD AVAILABLE, USING ADJUSTMENT. Left Graph: Nº1 LEAK. THE SMALLEST MAX. BALL PIN LOAD. LBS. 400 300 200 100 LARGE BALL PIN STROKES 4" AXLE VEL. FT/SEC. .5 1 1.5 Line Labels: 1, 3, 4 Right Graph: Nº4 LEAK. THE LARGEST MAX. BALL PIN LOAD. LBS. 400 300 200 100 SMALL BALL PIN STROKES 1" AXLE VEL. FT/SEC. .5 1 1.5 Line Labels: 1, 3, 4 | ||
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).