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).
Test report for a Stothert & Pitt Bump No. 4163, detailing performance at various speeds.
| Identifier | ExFiles\Box 149\2\ scan0044 | |
| Date | 26th June 1931 | |
| FEVERHERD - STOTHERT & PITT BUMP NO.4163. SUCTION LIFT 12 FT. PRESSURE HEAD 12 FT. 75/25 PETROL. Initial Pumping Speed - Dry - 2,200 R.P.M. " " " - Primed - 2,000 R.P.M. Minimum " " 250 R.P.M. PUMP SPEED R.P.M. TIME/½ GALL. SECS. PTS/HOUR. 250 63 229 500 15.67 920 1000 8.0 1800 1500 5.67 2540 2000 4.8 3000 Delivery very jerky at 1000 R.P.M. and below. Delivery stopped and without altering pump speed delivery recommenced when running at 1000 R.P.M., but at 500 and 250 R.P.M. it was necessary to speed up again; there was a good flow of petrol when actually delivering. | ||