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).
The axle ratio for Mr. Royce's car and two 'India 3's' cars.
| Identifier | ExFiles\Box 102\4\ scan0036 | |
| Date | 2nd July 1928 | |
| BY/TWD{T. W. D???Aeith} RHC{R. H. Coverley - Production Engineer} c. Hs.{Lord Ernest Hives - Chair} X5350 BY1/G.2.7.28. RE AXLE RATIO ON MR. ROYCE'S CAR AND THE FURTHER TWO INDIA 3'S. Please note that we shall require the 10/47 gear ratio for the above cars. Will the D.O. therefore kindly specify these gears to the Experimental Department, and in the event of the gear ratio being too low for the engine speed which is finally found possible Hs.{Lord Ernest Hives - Chair} will arrange to change over against the standard axle. We are awaiting AT re change of ratio BY.{R.W. Bailey - Chief Engineer} BY | ||