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).
Extract discussing the performance and required modification of a new choke design.
| Identifier | ExFiles\Box 50\3\ Scan097 | |
| Date | 4th June 1921 guessed | |
| X.4305 Extract from OY1/G3.6.21. X.3764 (9) CHOKER. X.4305. This was completed only a few days before shipping the car It is probably too severe in its action and the butterfly valve in the low speed air intake should be filed a little to increase the leakage round it when closed. We did have time, however, to prove that it would ~~give-personal~~ give a start immediately under very cold engine conditions. Further remarks on this device are contained in my personal letter of May 25th. to Mr. Hives. Two more chokers are nearly completed for trial here and Mr. Platford has brought us a pitlot jet which we will also try out at once. We all feel that it is essential that some device of this sort be put on the cars at the earliest possible moment, as every car not so equipped means trouble and expense to us and dissatisfaction to the customer next Winter. CY. | ||