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).
Instruction memo regarding the modification of a governor for Hall's Unit B-21 to achieve the ideal advance line.
| Identifier | ExFiles\Box 90a\4\ Scan179 | |
| Date | 13th May 1936 | |
| x262 to Hs{Lord Ernest Hives - Chair}/Wst. Hs{Lord Ernest Hives - Chair}/Swdl.{Len H. Swindell}13/KW.13.5.36. B-21 - Hall's Unit. Will you please arrange that the governor for the above unit to be made to suit the ideal advance line as carried out on a governor which we had from you for trial. This gave the required results, having a 5 coil 14 S.W.G. spring and the weights stopped off to a 10° flywheel angle range. The stop in the trial governor was only a temporary job, though serving its purpose for trial. Will you please see that the stopping on the correct governor is carried out ina manner that will be reliable and definite. Hs{Lord Ernest Hives - Chair}/L.H.Swindall. | ||