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 on top cup pumping, detailing fuel gauge readings against mileage and tank levels.
| Identifier | ExFiles\Box 44\3\ Scan125 | |
| Date | 10th December 1928 | |
| +9038 TOP CUP PUMPING TESTS. Calibrations O.K. 1 gallon to 20. Pressure balance cuts off after 20 gallons. Tank F.79192 (K.S.162) installed on carrier of 20 h.p.Rolls-Royce car; petrol being used out of this tank for running car. 2 vertical bell units fitted, i.e. One (B) normal position. One (A) in tank against near side baffle. /12/28. Approx.in tank. Mileage. Gauge. (A) (B) London traffic driving; dry roads. 19 84 0 0 89 2.5 6 17.7 94 10 15.5 99 15 16 04 (20) 15.5 16 14 14.25 15 16.4 24 (40) 13.5 15.5 Overnight 9/12/28. Short runs in country; many starts from very cold. 15.1 24 11 15 34 13.5 14.5 44 (60) 13 13.75 54 13 13.25 10/12/28. 13.8 58 13 Overnight 13 64 (80) Not taken 74 " " 12.5 84 (100) 12 12 | ||