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).
Performance graph for a diaphragm-type petrol pump, showing ball pin load versus external pressure at various RPMs.
| Identifier | ExFiles\Box 179b\2\ img210 | |
| Date | 17th December 1932 guessed | |
| PETROL PUMP DIAPHRAGM TYPE 1" STROKE BALL PIN LOAD LBS EXTERNAL PRESS LBS/D' 540 RPM = 1.5 FT/SEC 360 RPM = 1.0 FT/SEC 180 RPM = .5 FT/SEC 90 RPM = .25 FT/SEC BURSTING PRESS 250 LBS/D' BLADDER AND AC FABRIC | ||