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).
Speed gains from various aerodynamic body modifications.
| Identifier | ExFiles\Box 67\2\ scan0118 | |
| Date | 19th October 1927 guessed | |
| Tail. 2 1/2 M.P.H. 2 1/2. Wings removed 6 M.P.H. Carefully designed flared wings. 3. M.P.H. [Running boards] (crossed out) General body design, running boards removed spare wheels etc in tail etc Concealed Hood 2 M.P.H. Hood up 2 1/2 M.P.H. Opening Cut out - when streamline body fitted. 3 1/2 M.P.H - Vertical text: 15" x 5.2. 4.7 3.5 80 - 2775 } R.P.M 22 - 3700 } | ||