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).
Data table comparing ideal and actual values for flow rates measured in c.c. per minute.
| Identifier | ExFiles\Box 36\1\ scan 051 | |
| Date | 23th May 1917 guessed | |
| -2- Taking coeff .825 Ideal Ideal Ideal h1 h1¹ h2 h2¹ h3 h3¹ ________________________________________________ q1 | 199.0 | 164 | 163.9 | 135.2 | 131.8 | 108.6 ________________________________________________ q2 | 797 | 658 | 675 | 557 | 527 | 435 ________________________________________________ q3 | 1414 | 1166| 1197 | .988 | 937 | 773 ________________________________________________ q4 | 3187 | 2630| 2702 | 2230 | 2111 | 1742 ________________________________________________ c.c. per minute. | ||