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).
Requesting clarification on the servo operating cam angle (45° or 55°) for the Phantom model.
| Identifier | WestWitteringFiles\T\2July1928-December1928\ Scan270 | |
| Date | 18th December 1928 | |
| HS{Lord Ernest Hives - Chair}/RM.{William Robotham - Chief Engineer} FROM DA.{Bernard Day - Chassis Design} SECRET. DAL/M18.12.28. [Stamp: ORIGINAL] SS.{S. Smith} SERVO & BRAKES. X 7370 [Crossed out handwritten text: X 7420] The detail drawings of the Phantom servo operating cams which we have give a 55° angle. We recollect your speaking of a 45° angle. Would you please confirm which is the angle now used. We have looked through our calculations but as they have been based on a 55° angle in the present Phantom we cannot give any further instructions until we are sure of the actual angle that is used. DA.{Bernard Day - Chassis Design} | ||