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).
Interim report on the X-F-18 100 hours type test, detailing power curve and initial endurance runs.
| Identifier | ExFiles\Box 36\2\ scan 111 | |
| Date | 20th April 1927 | |
| Hs{Lord Ernest Hives - Chair}/FCW/LG20.4.27. X-F-18 100 HRS. TYPE TEST. Interim report on first bed test, power curve and 1st., 2nd. and 3rd. 10 hrs. POWER CURVE. Prior to the commencement of the 100 hrs. endurance run a power curve was taken under the conditions required by the A.I.D. and the following figures obtained :- R.P.M. B.HP. B.M.E.P. Cons. Pts/B.HP.Hr. 1600 352 134 .580 1700 374 135 .588 1800 399 135 .576 1900 422 136 .574 2000 443 136 .553 } Position of best power. 2100 460 134 .556 } 2200 474 132 .570 } 2300 487 130 .575 } 2350 494 129 .547 } 1st. 10 hrs. continuous. Average fuel consumption .52 pts/B.HP. Hr. " oil 4 pts/hr. Power at 2100 r.p.m. full throttle 456 C/HP. before 1st. 10 hrs., and 458.7 after. 2nd. 10 hrs. continuous. Average fuel consumption .51 pts/B.HP.Hr. " " oil 3.5 pts/hr. Full power at commencement 452.9 C/HP. at 2100 r.p.m. " " " finish 456 " 3rd. 10 hrs. continuous. Average fuel consumption .52 pts/B.HP.Hr. " " oil 4.0 pts/hr. Full power at commencement 457.6 C/HP. at 2100 r.p.m. " " " finish 456.0 " There are no failures up to date and the engine has now been placed on the hangar with 4-blader pusher prop: Details will be dealt with in complete report at end of test. Hs{Lord Ernest Hives - Chair}/F.C.Wenger. | ||