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).
Recommending Scheme 6 over Scheme 1 for Left Hand Engines, detailing issues with the latter's design.
| Identifier | WestWitteringFiles\T\January1929-February1929\ Scan156 | |
| Date | 16th February 1929 | |
| BY.{R.W. Bailey - Chief Engineer} FROM E.{Mr Elliott - Chief Engineer} Copy to B. " S.C. " W.H.R. " H.S. ORIGINAL SECRET. E2/M16.2.29. re. LEFT HAND ENGINES. X777 Confirming telephone conversation with you re. the above we strongly recommend you to use Sch. 6. (LeC.2669.) in preference to Sch. 1. in memo. E2/M9.2.29. Sch. 6. is suggested in memo. R5/M3.2.29. It demands no alteration whatever to existing SS.{S. Smith} and allows of maximum interchangeability of pieces. We do not like Sch. 1. because it demands larger push rod tubes in cylinder head to accommodate push rods at two different angles. The present tubes are already touching sparking plug bosses on the one side and cutting into gas-ways on the other. We think also it unduly cramps the tappet guide dogs against the cylinder block. E.{Mr Elliott - Chief Engineer} | ||