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 of delivery vs pump speed for a Bensport petrol pump, showing restrictions imposed by various S.U. float chamber parts.
| Identifier | ExFiles\Box 27a\2\ Scan208 | |
| Date | 23th June 1933 | |
| BENSPORT PETROL PUMP COMPLETE SUCTION SYSTEM .250 DIA PIPES. DELIVERY PIPE 5/16 DIA RESTRICTION IMPOSED BY VARIOUS PARTS OF S.U. FLOAT CHAMBERS 1. FLOAT CHAMBERS REMOVED 2. FLOAT CHAMBER COVERS WITHOUT FILTERS OR NEEDLE VALVE SEATS 3. AS FOR 2 WITH FILTERS 4. FLOAT CHAMBER COVERS, WITH FILTERS & .125 DIA NEEDLE VALVE SEATS, WITHOUT NEEDLES 5. FLOAT CHAMBER COVERS, WITH FILTERS & .095 DIA NEEDLE VALVE SEATS, WITHOUT NEEDLES 6. FLOAT CHAMBERS COMPLETE .125 DIA NEEDLE VALVE SEATS - FLOATS SUNK 7. FLOAT CHAMBERS COMPLETE .095 DIA NEEDLE VALVE SEATS - FLOATS SUNK Y-AXIS: DELIVERY PTS/HR X-AXIS: PUMP SPEED R.P.M. INITIALS: AHS | ||