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 plotting the mechanical efficiency and friction horsepower of Engine No SS-3 against its RPM.
| Identifier | ExFiles\Box 92\2\ scan0025 | |
| Date | 25th September 1928 | |
| MECHANICAL EFFICIENCY (SUPER SPORTS ENGINE). ENGINE No SS{S. Smith}-3. PERCENTAGE MECHANICAL EFFICIENCY. HORSE POWER. R.P.M. OF ENGINE. MECH. EFFICy. FRICTION H.P. 100%. 90%. 80%. 70%. 1000. 1500. 2000. 2500. 0. 10. 20. 30. 25-9-28. V432. | ||