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).
Drawings for the 'Heron' air pump for four-wheel brakes, highlighting required modifications to the springs.
| Identifier | ExFiles\Box 74\4\ scan0061 | |
| Date | 19th October 1922 | |
| To BY.{R.W. Bailey - Chief Engineer} from E.{Mr Elliott - Chief Engineer} c. to CJ. Wor.{Arthur Wormald - General Works Manager} Hs.{Lord Ernest Hives - Chair} "HERON" - AIR PUMP FOR FOUR WHEEL BRAKES X.3850 X.4550. We send you herewith drawings Nos. LeC.1641 & 1643 shewing respectively air pump and control valve springs, and air pump cam. The springs given on LeC.1641 differ slightly from those drawn on LeC.1626 and 1639, as the final calculations shewed that some modification was necessary. Would you kindly issue the necessary instructions. E.{Mr Elliott - Chief Engineer} | ||