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 comparing the specific consumption of a proposed 2-stroke engine against a 4-cycle engine.
| Identifier | ExFiles\Box 179b\3\ img174 | |
| Date | 7th February 1933 guessed | |
| COMPARISON OF CONSUMPTION PROPOSED 2 STROKE ENGINE 4 - CYCLE ENGINE BOTH WITH BORE & STROKE.- R.R. 2 STROKE AEC RICARDO MAXIMUM B.M.E.P. - R.R. 2 STROKE A.E.C.-RICARDO SPECIFIC CONSUMPTION (LBS/BHP/HR) PERCENTAGE OF NETT A.E.C. E... R.R. PROP... | ||