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).
Blueprint performance graph showing engine power curves and a valve timing diagram.
| Identifier | ExFiles\Box 182\M19\ img293 | |
| Date | 5th October 1931 guessed | |
| B.H.P. 140 130 120 110 100 90 80 R.P.M. 500 1000 1500 2000 2500 3000 3500 INDUCTION DEPN INS. HG. 4 3 2 1 B.M.E.P. LBS/SQ.IN. 110 100 90 80 70 60 EX IN O13 CLOE 60 12.7 22 56.5 ① ② ③ | ||