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 graphs comparing tractive resistance, acceleration, horsepower, and efficiency for two car models.
| Identifier | ExFiles\Box 29\3\ Scan139 | |
| Date | 26th February 1923 | |
| Top Headings: 6 EX ---- ALL READINGS CUT OUT OPEN OPEN TOURING 15x52 MEDIUM COMPRESSION WT WITH PASSENGERS 2.15 TONS 4 GII ---- OPEN TOURING 13x60 WT WITH PASSENGERS 1.625 TONS Graph A: TRACTIVE RESISTANCE LBS. PER TON. M.P.H. Labels: 4GII CAR & ENG, 6EX CAR & ENG, 4GII CAR, 6EX CAR Title: TRACTIVE RESISTANCE Note: (REDUCED) Graph B: ACCN FT PER SEC. PER SEC. M.P.H. Title: ACCELERATION Graph C: H.P. M.P.H. Title: H.P. TO ROTATE ENGINE (UNCORRECTED) THROTTLE OPEN. Graph D: H.P. M.P.H. Title: H.P. TO ROTATE ENGINE (THROTTLE OPEN) CORRECTIONS MADE FOR ROTATING PARTS & GEAR LOSSES Graph E: H.P. R.P.M. Legend: I.H.P., B.H.P., DYNO H.P. Graph F: H.P. M.P.H. Plot Lines: DYNO HP, ROAD HP Title: ROAD HP CURVES COMPARED WITH DYNO HP CURVES. Graph G: % EFFICIENCY R.P.M. Plot Lines: M.E. ENGINE, M.E. ENGINE & CAR Title: MECHANICAL EFFICIENCY ENGINE ENGINE & CAR Unlabeled Graph (Top Middle): HORSE POWER ROAD SPEED M.P.H Note 1: 3 OBTAINED FROM (1A-1B) + 2A Note 2: 4 GII & 6 EX CORRECTION FOR ROTATING PARTS FOR GRAPH C (SEE GRAPH D) Unlabeled Graph I (Middle Left): H.P. M.P.H. Title: ROTATING EFFECT 40/50 WHEELS Plot Lines: HP GIVEN OUT DECELERATING CLUTCH IN, HP GIVEN OUT DECELERATING CLUTCH OUT, HP ABSORBED ACCELERATING Unlabeled Graph J (Middle Right): H.P. M.P.H. Title: ROTATING EFFECT 40/50 FLYWHEEL Plot Lines: HP GIVEN OUT DECELERATING, HP ABSORBED ACCELERATING Bottom Legend: THICK LINES FOR 6 EX DOTTED LINES FOR 4 GII | ||