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).
Calculations for five distinct cases of engine performance correction factors.
| Identifier | ExFiles\Box 37\3\ scan 102 | |
| Date | 9th August 1917 | |
| R.R. 228 A (170 H) S.D. 442. 9-8-17) Q. 1865 X. 31784. ③ Five cases A.I.D. Bo/B = Po/P . T/To Ⓐ If Po = 29.9, To = 289. Corrn = 3.34h + .345t Ⓑ if only for pressure Corrn = 3.34h Ⓒ etc's Corrn to I.H.P. is 3.34h + .173t Ⓓ and to B.H.P. 3.7h + .19t Ⓔ If P = 28.0 T = 298 Corrn A = 298/289 x 299/280 = 110.0 c.e. + 10.0 Corrn B = 6.35 + 3.1 = +9.45 Corrn C = 6.35 Corrn D = 7.9 Corrn E = 8.7 | ||