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 plotting engine R.P.M. against notches on a quadrant, comparing governor lag between a roller bearing throttle and a standard governor.
| Identifier | ExFiles\Box 66a\3\ scan0103 | |
| Date | 27th October 1926 guessed | |
| GOVERNOR LAG CHASSIS 8 EX. ROLLER BEARING THROTTLE. STANDARD GOVERNOR ENGE R.P.M. DOWN UP NOTCHES ON QUADRANT. FIG III | ||