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).
Carburettor choke designs and the development of an automatic choke.
| Identifier | ExFiles\Box 174\3\ img216 | |
| Date | 4th April 1940 | |
| - 3 - Cont'd.{John DeLooze - Company Secretary} Rm.{William Robotham - Chief Engineer}1/HO.4.4.40. Fitted with 1- 1/32 chokes, the top half of the carburettor being the same as AAV.25. Once again, the throttle between the throttle spindle and the choke spindle may be deleted. We understand that you are clear with regard to the air silencer as you have already made a suitable design and this is referred to in your Memo Ev.{Ivan Evernden - coachwork}8/JR.{Mr James Royce}19.3.40 to Rm{William Robotham - Chief Engineer}/ym. Our ultimate aim on the automatic choke is to obtain a thermostat which will operate the automatic start without the necessity for the electric heating element. It is improbable that the position or dimensions of the choke need be altered, i.e. it is safe to go ahead with a scheme incorporating a bi-metal strip in the induction pipe casting. Should there be any further query remaining with regard to the information necessary to produce these designs we should be glad if you would submit it in writing to Rm.{William Robotham - Chief Engineer} Inevitably, there are a number of separate people engaged on carburettor development and it is only by obtaining their combined views in a discussion that an agreement can be reached as to what exactly is required. Rm.{William Robotham - Chief Engineer} | ||