Data table for a Venturi petrol flow meter with a mercury gauge, correlating manometer readings with flow rates.
| Identifier | ExFiles\Box 37\2\ scan 123 | |
| Date | 8th December 1917 | |
| X. 3180 8.12.17. C. 804 X 3180 VENTURI PETROL FLOW METER (With mercury gauge). Table based upon G = .1865 √H Difference of level in manometer gauge. | Flow in galls/minute. | Time for 4 pints in seconds. [Handwritten annotation between columns 1 and 2: Pints per hr 240] 7.20 | .500 | 60 6.97 | .492 | 61 6.74 | .484 | 62 6.53 | .476 | 63 6.33 | .469 | 64 6.13 | .4615 | 65 5.96 | 4.55 | 66 5.76 | .4475 | 67 5.60 | .441 | 68 5.44 | .435 | 69 5.28 | .428 | 70 5.14 | .4225 | 71 5.01 | .417 | 72 4.87 | .411 | 73 4.73 | .4055 | 74 4.60 | .400 | 75 4.50 | .395 | 76 4.26 | .385 | 78 4.05 | .375 | 80 3.85 | .366 | 82 3.67 | .357 | 84 3.51 | .349 | 86 3.35 | .341 | 88 3.19 | .333 | 90 Contd. | ||
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).