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).
Series of performance data graphs for the 49 G.B. Open Touring Body vehicle.
| Identifier | ExFiles\Box 113\2\ scan0030 | |
| Date | 18th January 1923 | |
| Top Left Graph: HORSE POWER, R.P.M., I.H.P, B.H.P CLUTCH, B.H.P ROAD WHEELS DYNAMOMETER, B.H.P & I.H.P. Top Middle Graph: ACCELERATION IN F.P.SEC, SPEED IN MILES PER HOUR., ACCELERATION. Top Right Graph: % EFFICIENCY, R.P.M., ENGINE, CHASSIS & ENGINE, MECHANICAL EFFICIENCY. Bottom Left Graph: T.R. LBS. PER TON, SPEED M.P.H., ENGINE & CAR, CAR ONLY, TRACTIVE RESISTANCE. Bottom Right Graph: HORSE POWER, ROAD SPEED M.P.H., HORSE POWER ABSORBED ROTATING ENGINE., Preliminary Testing. Center Information: OPEN TOURING BODY, 49 G.B., 18/1/23, CAPACITY 23.5 CU. INS., AXLE RATIO 14 x 52, WEIGHT 41 CWT., CUTOUT CLOSED. | ||