Alternative lubrication method for a tyre pump on a 40/50 HP chassis, including specifications for valve springs and gearing.
| Identifier | Morton\M21\ img063 | |
| Date | 8th October 1920 | |
| To DA. {Bernard Day - Chassis Design} from E. {Mr Elliott - Chief Engineer} Copy to CJ. " " BN. {W.O. Bentley / Mr Barrington} " " BY. {R.W. Bailey - Chief Engineer} " " HS. {Lord Ernest Hives - Chair} " " EFC. {E. Fowler Clarke - Electrical Engineer} X.4194 ORIGINAL. ARMOURED CAR RE TYRE PUMP - 40/50 H.P. CHASSIS. Referring further to the above, an alternative method of lubricating the crankpin of the pump as suggested by Mr. Royce which can be tried if the method of lubricating shewn on Lec.1295 is not satisfactory, consists of an annulus in each crank disc with drilled oil hole leading up to the crankpin, as per sketch - Referring to the valve springs, these should be about ½ lb each in load, the gearing is of 12 diametral pitch, and the small wheel has 37 teeth, and the large one 57. E. {Mr Elliott - Chief Engineer} | ||
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).