On Book-Cadillac Hotel letterhead discussing and comparing various engine features, including tappets and oil cooling systems.
| Identifier | ExFiles\Box 173\4\ img069 | |
| Date | 28th November 1935 guessed | |
| HOTELS NEW YORKER & LEXINGTON, NEW YORK - NETHERLAND PLAZA, CINCINNATI - ADOLPHUS, DALLAS - VAN CLEVE, DAYTON Book-Cadillac Hotel DETROIT Ralph Hitz (H) President 6 (circled) The GM side valve engines have a new silent tappet put in by main oil pressure and is said to be a miracle. I have a sample of this arrangement for putting air free oil. The GM oil cooling is not circulating the oil in the engine which is on a closed paddle. But one oil company is using the water jacket on the V8 (others of the cylinder block) and on the V engines down the crank case as well. The cam notes on the Cadillac V8 are very quiet and this at 30°F is the [unclear symbol] GRY {Shadwell Grylls} | ||
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).