Graph plotting Brake Horsepower and Brake Mean Effective Pressure, comparing performance with test bed silencers versus road silencers.
| Identifier | ExFiles\Box 170\1\ img075 | |
| Date | 14th December 1939 guessed | |
| B.H.P. B.M.E.P. SHEET I FIGURES PROVIDED BY JHR. ② CLUTCH H.P. WITH TEST BED SILENCERS FITTED. ① CURVE DERIVED FROM ACCELERATION FIGURES OBTAINED ON THE ROAD. I.E. IT IS A CLUTCH H.P. CURVE FOR A UNIT FITTED WITH ROAD SILENCERS. FIGURES PROVIDED BY JHR. ③ DIRECT COMPARISON OBTAINED FROM ACCELERATION FIGURES. | ||
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).