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 results of J.III petrol pump tests, plotting delivery rate against pump speed under various conditions.
| Identifier | ExFiles\Box 106\2\ scan0090 | |
| Date | 23th May 1932 | |
| J.{Mr Johnson W.M.} III PETROL PUMP TESTS. POSITION OF VALVE PORTS IN RELATION TO VALVE SEATS. PUMP STROKE .200" DELIVERY PTS/HR. PUMP SPEED R.P.M. LE.C.2961 HEAD. DISTANCE 'X' NIL. 2 AIR BOTTLES TIME TO PUMP WHEN DRY. 3 MIN. 10 SECS. LE.C.2961 HEAD. DISTANCE 'X' .050". 2 AIR BOTTLES. TIME TO PUMP WHEN DRY. 3 MIN 40 SEC. LE.C.2907 HEAD. DISTANCE 'X' NIL. 1 AIR BOTTLE. TIME TO PUMP WHEN DRY. 3 MIN .250 DIA | ||