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).
Revised chart for the F.II No. 27 engine duration test.
| Identifier | ExFiles\Box 36\2\ scan 181 | |
| Date | 1st October 1928 | |
| RR.F.II. No 27 DURATION TEST. 7/1 COMPRESSION RATIO. GEAR. .477. B.H.P.= WN/1200 THE THROTTLE AND BRAKE TO BE ADJUSTED FOR STAGE 3 TO 10 TO GIVE THE REQUIRED B.H.P. AND R.P.M. TABLE DATA: STAGE | DURN. | THROTTLE POSITION | B.H.P. | ENG. R.P.M. | REQUIRED LBS. ON BRAKE | EQVT. ALT. | FLYING CONDITIONS | REMARKS (EXPECT) | DYNO R.P.M. | REV. COUNTER DRIVE R.P.M. 1 | 1/4 HR. | FULL | - | 2212 | - | SEA LEVEL | TAKE OFF | 556 BHP | 1055 | 553 2 | 3/4 HR | FULL | - | 2500 | - | CLIMB | CLIMB | 590 | 1192 | 625 3 | 10 HRS | THROTTLED | 338 | 2328 | 365.5 | 2280 FT | CRUISING | - | 1110 | 582 4 | 7 1/2 | " | 315 | 2311 | 343.0 | 4485 " | " | - | 1102 | 578 5 | 7 1/2 | " | 295 | 2295 | 323.5 | 6335 " | " | - | 1093 | 574 6 | 8 | " | 268 | 2278 | 296.0 | 8260 " | " | - | 1085 | 569.5 7 | 10 | " | 231 | 2255 | 258.0 | 10000 " | " | - | 1075 | 564 8 | 12 1/2 | " | 185 | 2230 | 209.0 | 10000 " | " | - | 1063 | 557.5 9 | 16 | " | 120 | 2190 | 138.0 | 10000 " | " | - | 1045 | 547.5 REVISED CHART 1-10-28. | ||