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).
Graph of test bed power curves for 'F' engines in 3F aeroplanes at Farnborough.
| Identifier | ExFiles\Box 36\2\ scan 226 | |
| Date | 9th June 1927 | |
| TEST BED POWER CURVES FOR 'F' ENGINES IN 3F AEROPLANES AT FARNBOROUGH. F12A.59 - 6:1 COMPn RATIO. F12.B.3. - 7:1 " " C/B.H.P. R.P.M. 'F' 7:1 COMPn RATIO NAPIER LION IOA 'F' 6:1 COMPn RATIO AER/1619 9/6/27 | ||