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).
Graph showing the variation in performance with temperature for a Delco Damper.
| Identifier | ExFiles\Box 56\1\ Scan037 | |
| Date | 9th January 1931 guessed | |
| SHEET V VARIATION IN PERFORMANCE WITH TEMPERATURE DELCO DAMPER. AXLE VELOCITY .75 FT/SEC STROKE 4" LOW PRESSURE OIL TEMP 20°C. MEAN BALL PIN LOAD 29.2 MAX. BALL PIN LOAD 33.0 LBS. OIL TEMP 67°C MEAN BALL PIN LOAD 24.6 MAX. BALL PIN LOAD 30.7 4" STROKE HIGH PRESSURE OIL TEMP 25°C MEAN BALL PIN LOAD 215 MAX. BALL PIN LOAD 308 OIL TEMP 0°C MEAN BALL PIN LOAD 408 MAX. BALL PIN LOAD 500 LBS. OIL TEMP 65°C MEAN BALL PIN LOAD 121 LBS. MAX. BALL PIN LOAD 175 LBS. 4" STROKE Nº OF OSCILLATIONS PER MIN. 70 DELCO VALVES FITTED 26. G4 DELCO LOVEJOY OIL PRESSURE 100 LBS/D" 0°C | ||