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).
Calibration chart for an 18-gallon petrol gauge for a 20 HP vehicle.
| Identifier | ExFiles\Box 61\3\ scan0263 | |
| Date | 21th October 1931 guessed | |
| K.S. 20 HP. 18 GALLON PETROL GAUGE. Petrol Tank Arrgt. F.58195. With tank and gauge set to correct angles and pipes fitted the liquid level was corrected. Length of pipes 16 ft. | Galls. in Tank | Gauge Readings | |---|---|---| | | Filling. | Emptying | | 0. | 0. | 0. | | 1. | 0.6 | 0. | | 2. | 1.0 | 1.0 | | 3. | 2.0 | 2.0 | | 4. | 3.0 | 3.0 | | 5. | 4.0 | 4.0 | | 6. | 5.0 | 4.9 | | 7. | 5.5 | | | 8. | 6.2 | | | 9. | 7.2 | | | 10. | 8.0 | 8.3 | | 11. | 9.0 | | | 12. | 10.0 | | | 13. | 10.9 | | | 14. | 11.7 | 11.9 | | 15. | 12.8 | | | 16. | 13.7 | | | 17. | * 14.7 | | | 18. | 16.0 | | * Pump Ceased to Function. | ||