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).
Preferred carburetter settings for power and economy, with a warning about incorrect mixture settings.
| Identifier | WestWitteringFiles\K\August1923\ Scan22 | |
| Date | 27th August 1923 | |
| TO FM. FROM R.{Sir Henry Royce} c. to CJ. BJ. EP.{G. Eric Platford - Chief Quality Engineer} c. to HM.{Capt. W. Hallam - Head Repairs} HS.{Lord Ernest Hives - Chair} H.{Arthur M. Hanbury - Head Complaints} BR.{T. E. Bellringer - Repair Manager} ORIGINAL. With reference to your memo. (PN{Mr Northey}13/DN23.8.23.) sent to EP.{G. Eric Platford - Chief Quality Engineer} at WW. which arrived after he had left. I prefer carburetters set for best power in central position. Best dead slow running control 2 notches strong, best economy 2 notches weak. WARNING. Avoid relatively weak high speed jet and relatively strong low speed jet; bad for economy and also for impressions of power as a weak mixture burns too slowly for high speed; strong mixture at low speed means a dirty engine. Avoid weak setting of carburetter when engine fully warm. R.{Sir Henry Royce} | ||