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).
Graph of car speed versus engine RPM for various 20 HP gear box ratios with an 11/50 axle ratio and 31.400 inch effective wheel diameter.
| Identifier | ExFiles\Box 6\4\ 04-page081 | |
| Date | 2nd February 1925 | |
| FIGURES FOR 11/50 AXLE RATIO & WHEEL DIA OF 31.400 (EFFECTIVE) INDIA AS PER PROPOSAL IN TELEGRAM REFERRED TO IN ACCOMPANYING MEMO R151/M26 2.2.25 INDIA SUGGESTED ALTERNATIVE 2nd SPD BY ADDING ONE TOOTH GOVERNMENT & AS AT PRESENT CAR M.P.H FORWARD REVERSE ENG R.P.M. DIRECT .715 Top FOR BOTH BOXES S.P.D .500 .465 2ND .346 1ST .374 20 H.P. GEAR BOX RATIOS | ||