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).
Hand-drawn diagram showing a double dash arrangement for Mr Thorsen's car.
| Identifier | ExFiles\Box 74\3\ scan0149 | |
| Date | 28th July 1923 | |
| AIR ENTRANCE HOLES. PASSAGE OF COOL AIR. 1/16 AL. 3/16" AIR SPACE. 2 BA. c'sunk SCREWS. DOUBLE DASH ARRANGEMENT ON MR THORSEN'S CAR Oy July 28 '23 | ||