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).
Design proposal for a steel bonnet without rivets, showing sections of the top and side hinges.
| Identifier | ExFiles\Box 12\7\ 07-page178 | |
| Date | 8th July 1931 guessed | |
| MAXIMUM OPENING OF BONNET THIS FIXED PIECE CAN BE RAISED THUS & PLATED OR CAN BE FLUSH & PAINTED SECTION OF TOP HINGE CHROMIUM PLATED SECTION OF SIDE HINGE PROPOSED STEEL BONNET WITHOUT RIVETS | ||