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).
Graph comparing fuel consumption of an untreated versus a 'Katalited' Ricardo head at part throttle.
| Identifier | ExFiles\Box 74\3\ scan0371 | |
| Date | 12th November 1923 | |
| Sheet no 4 Fuel consumption part throttle Ricardo head Curve #1 = untreated head Curve #2 = Head Katalited Curve #1 Curve #2 21% decrease Lbs. per B.P. hour R.P.M. in hundreds. HCH 12-11-23. | ||