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).
Calculation of a correction table based on standard temperature and pressure.
| Identifier | ExFiles\Box 37\3\ scan 101 | |
| Date | 9th August 1917 guessed | |
| Calculation of correction table Standard temp. = 16°C = 289°C abs. Standard pressure = 29.9 B₀ = (29.9 / P) x (T / 289) x 100 = 103.46 x (T / 10P) = 103.46 { (x / 10P) + (T - x) / 10P } = 100 + 103.46 (T - x) / 10P where x = 1000 P / 103.46 or B₀ = 100 + (100 / x) (T - x) = 100 T / x P x 100/x 28.0 270.7 .3695 B₀ = 100 + .3695 (T - 270.7) 28.5 275.5 .363 B₀ = 100 + .363 (T - 275.5) 29.0 280.3 .357 B₀ = 100 + .357 (T - 280.3) 29.5 285.1 .351 B₀ = 100 + .351 (T - 285.1) 30.0 289.9 .345 B₀ = 100 + .345 (T - 289.9) 30.5 294.8 .339 B₀ = 100 + .339 (T - 294.8) 31.0 299.6 .334 B₀ = 100 + .334 (T - 299.6) | ||