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).
Testing of a Goshawk 3 three-speed gearbox with a servo mechanism.
| Identifier | ExFiles\Box 6\4\ 04-page023 | |
| Date | 7th January 1925 | |
| X5370 To Hs.{Lord Ernest Hives - Chair} from R.{Sir Henry Royce} SECRET. RL/M7.1.25. c. to CJ. BJ. c. to RG.{Mr Rowledge} E.{Mr Elliott - Chief Engineer} c. to DA.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} c. to AJS. GOSHAWK 3. THREE SPEED X.5770 GEARBOX WITH SERVO. X.5310 X.5370 Mr. Stent points out that this servo gearbox should be tested with the same load on the servo shaft as it will be required to carry when driving the servo with brakes applied. I trust that the servo and the brake gear will be ready at once so that the whole can be tested. I have not heard that the hand brake lever has been satisfactory got in with the servo on the driver's side of box. R.{Sir Henry Royce} | ||