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).
Note on the use of induction exhaust pipe jacketing or the 'hot spot' principle in American cars.
| Identifier | ExFiles\Box 50\3\ Scan002 | |
| Date | 15th December 1920 guessed | |
| -2- could be used to advantage. It is certainly a fact that several American cars are quite satisfactory in this respect, and they are either fitted with ample induction exhaust pipe jacketing or the "hot spot" principle. EP. {G. Eric Platford - Chief Quality Engineer} EB | ||