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 showing Mechanical Efficiency and Friction Horse Power against R.P.M. for the Super Sports Engine No SS-3.
| Identifier | ExFiles\Box 19\7\ Scan123 | |
| 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. EFF'CY, FRICTION H.P., V432, 25-9-28, 100%, 90%, 80%, 70%, 30, 20, 10, 0, 1000, 1500, 2000, 2500 | ||