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).
The operating principle of the Goshawk 11 double throttle controls.
| Identifier | ExFiles\Box 56\3\ Scan078 | |
| Date | 22th September 1921 | |
| X4239 To Da.{Bernard Day - Chassis Design} from E.{Mr Elliott - Chief Engineer} c. to CJ. c. to Wor.{Arthur Wormald - General Works Manager} c. to Hs.{Lord Ernest Hives - Chair} c. to BY.{R.W. Bailey - Chief Engineer} E2/G22.9.21. X.4239 - RE GOSHAWK 11. CONTROLS. We send you herewith drawing No.1eC.1454 illustrating the Goshawk 11. controls. This drawing has been specially made to shew the principle clearly whereby the double throttle is operated. The accelerator pedal always returns to its stop formed by the floorboards. The throttle mechanism returns to the stop lever marked "A" set by the steering wheel control. The spring "B" has to overcome the small throttle spring "C" when the throttle is allowed to close. The springs "B", "D" and "E" resist the foot pressure of the accelerator pedal while the spring "C" assists the foot pressure. In the actual scheme springs "B" and "E" are designed as torsion springs, but are shewn diagrammatically on this drawing as tension springs for clearness. E.{Mr Elliott - Chief Engineer} | ||