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 with two columns of corresponding numerical values labeled 'H' and 'h'.
| Identifier | ExFiles\Box 77\5\ scan0150 | |
| Date | 26th April 1917 | |
| R.R. 235A (500 T) (S:D.{John DeLooze - Company Secretary} 408. 26-4-17.) Bm. 2/156/13. H h 355 13.63 360 13.69 365 13.75 370 13.81 375 13.87 380 13.93 385 13.99 390 14.04 395 14.10 400 14.15 410 14.26 420 14.36 430 14.47 440 14.57 450 14.66 460 14.76 470 14.85 480 14.94 490 15.03 500 15.12 510 15.21 520 15.29 530 15.37 540 15.45 550 15.53 560 15.61 570 15.69 580 15.76 590 15.84 600 15.91 610 15.98 620 16.05 630 16.12 640 16.19 650 16.26 660 16.33 670 16.39 680 16.45 690 16.52 700 16.58 710 16.64 720 16.70 730 16.76 740 16.82 750 16.88 760 16.94 770 16.99 780 17.05 790 17.11 800 17.16 | ||