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).
The design and function of the 20 HP petrol filler cap.
| Identifier | ExFiles\Box 106\2\ scan0028 | |
| Date | 28th November 1928 | |
| To PN.{Mr Northey} from Hs.{Lord Ernest Hives - Chair} X57460 Hs{Lord Ernest Hives - Chair}2/LG2.11.28. 20 HP. PETROL FILLER CAP. X.57460 The 20 HP. petrol filler cap is a similar lock to the Phantom i.e., there is a spring steel plate at the top of the cap which creates friction on the thread. It might happen that Mr. Sydney has seen a Phantom in which a spring plate was slotted, whereas on the 20 HP. it is a plain disc. We are certain however that providing the petrol tank cap is screwed up tightly by hand, it will never work loose. Hs.{Lord Ernest Hives - Chair} | ||