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).
Table showing coefficients of discharge for different petrol horizontal nozzles under three different head pressures.
| Identifier | ExFiles\Box 36\1\ scan 054 | |
| Date | 20th October 1917 guessed | |
| PETROL HORIZONTAL - COEFFICIENTS OF DISCHARGE Nozzle. Head 1. Head 2. Head 3. A1 .814 .823 .826 A2 .783 .768 .796 A3 .728 .713 .720 A4 .653 .641 .637 B1 .828 .855 .972 B2 .800 .827 .844 B3 .759 .785 .796 B4 .721 .740 .749 C1 .8175 .810 .800 C2 .785 .797 .783 C3 .750 .787 .769 C4 .721 .770 .757 D1 .744 .715 .825 D2 .743 .702 .818 D3 .743 .694 .812 D4 .743 .677 .800 | ||