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).
List of modifications made to vehicles to meet American running conditions.
| Identifier | ExFiles\Box 29\2\ Scan064 | |
| Date | 1st November 1922 guessed | |
| - 4 - (A) Modifications to meet American running conditions. (1). Vaporizer scheme & Starting jet. This has been a matter under discussion between R.{Sir Henry Royce} Derby, & Springfield, and it was known something had to be done to make the running of car possible under certain winter conditions which are the rule in U.S.A. (2). Bosch Magneto & Battery Ignition. The American Bosch Magneto was passed for us by a standardization sheet issued from Derby, the Battery Ignition was modified by adopting the Bosch system in place of R.R. on plea of service requirements demanding it. (3). Cylinders. Valve guides were bushed to enable valve spindle fits to be maintained. This has been standardized at Derby for English use. (4). Bijur Starting & Lighting equipment. Adopted in place of Lucas on account of latter not being obtainable for service replacements in America. (5). Connecting Rod. Bush at small end driven tight into rod instead of floating. Derby think this desirable. (6). Petrol Tank. Fitted with side filler and petrol level gauge. This was submitted to R, originally and agreed to if lightened and improved. (7). Lubrication of Universal Joint behind Gearbox. Our latest scheme for using a pipe between Joint and a fitting on side member where oil gun is attached not adopted. They are trying to lubricate automatically from gearbox. This is not thought by us to be practicable. (8). Strengthening up of Internal sphere (fixed) of Universal Joint. This is unnecessary - never had more than one failure in England on 4000 cars and then due to part being made far too thin. (9). Adoption of a locked Ignition Switch on the Dashboard permitting them to use Klaxon Push Button on top of Steering Column. It is thought desirable to improve the type of push button they adopted. | ||