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).
Performance analysis chart for a 45 HP Renault, plotting Brake Horse Power against Engine R.P.M.
| Identifier | ExFiles\Box 73\3\ scan0303 | |
| Date | 3rd February 1925 | |
| ANALYSIS OF CURVES OF ACCELERATION OF 45 H.P RENAULT GIVEN IN THE MOTOR 3 / 2 / 25 Y-Axis: CLUTCH BRAKE HORSE POWER Values: 0, 20, 40, 60, 80, 100, 120, 140, 160, 180, 200 X-Axis: ENGINE R.P.M. Values: 0, 1000, 2000, 3000 Bottom text: TYRE SIZE ? Vertical lines representing speed: 10 M.P.H, 20 M.P.H, 30 M.P.H, 40 M.P.H, 50 M.P.H, 60 M.P.H, 70 M.P.H, 80 M.P.H Curve labels: Lowest curve: BRAKE H.P. REQUIRED TO LAST THE CAR AT THE ROAD SPEEDS IN QUESTION Middle curve (A): BRAKE H.P. REQUIRED TO PRODUCE ACCELERATION CURVE GIVEN BY THE MOTOR Top curve: RESULTANT B.H.P. NECESSARY TO PRODUCE THESE RESULTS i.e. (CURVE A + CURVE B) NOTE CONVEXITY! Other text on chart: MAKERS CLAIMED MAXIMUM H.P B TRACTIVE RESISTANCE CONSIDERED NORMAL RESULTING MAX SPEED MAKERS H.P. | ||