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 comparative tests of a sports petrol pump with a standard spring versus a strong spring.
| Identifier | ExFiles\Box 27a\2\ Scan181 | |
| Date | 27th May 1933 | |
| BENT. SPORTS PETROL PUMP COMPARITIVE TESTS WITH STANDARD SPRING AND STRONG SPRING 12' FT 1/4" PIPE LINE. 1/16" & 9/16" DIA STRAIGHT DELIVERY PIPE DELIVERY FROM 1000 R.P.T PUMP Text associated with solid line (top): STD BATTLES STRONG SPRING ALL HOLES 3/32 DIA 12" SUCTION STRAIGHT DELIVERY Text associated with dashed line (bottom): ALL Holes .312" DIA STD SPRING 12" SUCTION STRAIGHT DELIVERY. STD BATTLES 3.8lbs/sq" | ||