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).
Design and application of hot spot induction pipes for a 40/50 HP chassis.
| Identifier | ExFiles\Box 50\3\ Scan068 | |
| Date | 27th April 1921 | |
| To Hs. {Lord Ernest Hives - Chair} from R. {Sir Henry Royce} c. to CJ. c. to PN. {Mr Northey} c. to HM. {Capt. W. Hallam - Head Repairs} c. to Da. {Bernard Day - Chassis Design} c. to BY. {R.W. Bailey - Chief Engineer} c. to R.R. of American Inc. for attention of OY. X4305 R2/G27.4.21. X.4305 - RE HOT SPOT INDUCTION PIPES. 40/50 HP.CHASSIS. With reference to the above, there is a considerable range of opinion as to the best point to apply the heat. I understand Hs. {Lord Ernest Hives - Chair} to say as near as possible to the carburetter, OY. to say along the induction pipe right to the end cylinder. My own impression is that probably the most practicable position is that we shew in the drawing sent from here, which we know as the "change-over central heating scheme". As this scheme seems to be the most practicable that can be applied to our present 40/50 H.P. arrangement, I should be pleased if this will go forward as quickly as possible, and I suggest that you get it proved, and running on as many cars as is practicable. Mr. Elliott tells me that this arrangement was shewn on our drawing distinctly with induction pipe made in two parts and not run right across, and we had no idea of making the plugs in the ends of the exhaust boxes of anything else but steel. I shall be pleased, therefore, if this arrangement is adopted promptly. It will be remembered that it is our intention as soon as possible to do away with the primer, and substitute a dead-slow speed running jet with a special pipe carrying the fuel across to the branch of the induction pipe where the hot spot is to be. This extremely small jet will be | ||