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).
Suggestion to test an improved horizontal S.U. carburetter on the 20 HP model.
| Identifier | ExFiles\Box 31\4\ Scan040 | |
| Date | 19th October 1927 | |
| X.1437 Hs.{Lord Ernest Hives - Chair} from R.{Sir Henry Royce} R3/M19.10.27. CARBURETTERS. Many people are using the improved horizontal S.U. It would be an easy matter to try one on our 20 HP. R.{Sir Henry Royce} | ||