Hand-drawn sketch of an exhaust manifold showing areas of burning and scaling.
| Identifier | WestWitteringFiles\T\2January1929-June1929\ Scan017 | |
| Date | 1st January 1929 guessed | |
| BURNT THROUGH SCALING | ||
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).