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).
Fitting 11 tooth pinions to the 20 HP chassis back axles.
| Identifier | ExFiles\Box 49\2\ Scan201 | |
| Date | 18th August 1924 | |
| To BJ. from R.{Sir Henry Royce} c. to CJ. PN.{Mr Northey} BY.{R.W. Bailey - Chief Engineer} Hs.{Lord Ernest Hives - Chair} X.4256 R1/M18.8.24. RE. 20 HP. BACK AXLE RATIOS. X.4256 In reply to your memo. BJ22/H14.8.24., since we are particularly anxious that the 20 HP. chassis shall not appear sluggish, I am quite agreeable to all the back axles fitted with the 11 tooth pinions, since they are now considered equally silent, of ample strength, and wear well. R.{Sir Henry Royce} | ||