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).
Nomogram for calculating engine performance by connecting Working Volume, RPM, Brake Mean Effective Pressure, and Brake Horse Power.
| Identifier | ExFiles\Box 77\5\ scan0155 | |
| Date | 16th May 1918 | |
| NOMOGRAM CONNECTING WORKING VOLUME, R.P.M., B.M.E.P. & B.H.P. LEFT AXIS (TOP TO BOTTOM): WORKING VOLUME CUBIC CENTIMETRES 5000 to 12500 FALCON WORKING VOLUME 12500 to 15000 EAGLE WORKING VOLUME 15000 to 20000 CONDOR WORKING VOLUME 20000 to 50000 B.H.P. 300 to 1000 RIGHT AXIS (TOP TO BOTTOM): WORKING VOLUME CUBIC INCHES 300 to 3000 REVOLUTIONS PER MINUTE 1000 to 2500 CENTRAL AXIS (TOP TO BOTTOM): BRAKE HORSE POWER 300 to 800 REFERENCE LINE BRAKE MEAN PRESSURE POUNDS PER SQUARE INCH 50 to 160 STAMP: ROLLS-ROYCE LIMITED DERBY A.I.D. DEPT. 18 MAY. 1918 HANDWRITTEN: E.7.C. 16/5/18 | ||