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).
Alterations to the gearbox and engine for a 4-wheel brake system.
| Identifier | ExFiles\Box 73\2\ scan0228 | |
| Date | 29th January 1924 | |
| X9940 To R.{Sir Henry Royce} from E/DA.{Bernard Day - Chassis Design} c. to CJ. RG.{Mr Rowledge} c. to HS.{Lord Ernest Hives - Chair} BY.{R.W. Bailey - Chief Engineer} SECRET. EAC. E2/M29.1.24. RE. ALTERATION TO GEARBOX AND ENGINE FOR 4 WHEEL BRAKES. X.9940 X.9320 X.9660 We had reached the same conclusion at Wittering as yourself, that it was necessary to scrap the gearbox casting, and drive a slow speed servo from the third motion shaft as per one of your earlier schemes. We had a rough scheme shewing the EAC.4. servo motor on the 40/50 box, and found that it was necessary to move the dynamo as you concluded. The servo was driven by a 7 to 1 worm in the rear compartment of the box through a 3 to 1 spur reduction. This latter was used to step the servo forward. As regards the Lucas dynamo this will go in, being an eccentric machine, in the place now occupied by the magneto, and the latter can be pushed further to the rear, except on P. and R series, where the valve tappet rocker pockets are all alike, and some machining of the crankcase appears necessary. As instructed all possible efforts are now directed on EAC.4. box and servo. E/DA.{Bernard Day - Chassis Design} | ||