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).
Description of the operation of a dual throttle control and induction pipe mechanism.
| Identifier | ExFiles\Box 147\2\ scan0081 | |
| Date | 19th September 1938 guessed | |
| a lever E and a connection to the driver's throttle control, not shown. A pin E¹ on lever E engages in a slot E² on a link E³ articulated at its end to a lever E⁴ rigid with the throttle valve D³. It will be seen that as the driver operates his throttle control, the throttle D⁴ will first be opened while pin E¹ slides in slot E² and thereafter pin E¹ bearing on the end of the slot will cause throttle D³ to be opened. Throttle D³ will commence to open before throttle D⁴ is fully opened and will open more rapidly than throttle D⁴ because lever E⁴ is shorter than lever E.{Mr Elliott - Chief Engineer} These levers are so proportioned with reference to each other and the length of slot E² that both the throttles D³ and D⁴ will reach the fully opened position together. The return movement of the throttles is brought about by springs. The ends of the two induction pipes communicate by two branch pipes F and F¹ with the induction manifold, not shown, and the division between the two induction pipes is continued as far as the position marked in dotted lines in Figure 2 at F². 4 | ||