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).
Blueprint comparing the frontal area calculations for different saloon car body styles.
| Identifier | ExFiles\Box 160\2\ scan0167 | |
| Date | 30th January 1933 | |
| BROWNING AREA = 22.87 SQ FT STD. SALOON. AREA 23.40 FT. CHASSIS CYCLE TYPE AREA 22.16 SQ FT NO WINGS AREA 21.71 SQ FT SLIPPER TYPE AREA 20.00 FT STREAMLINE SALOON. AREA = 18.025 SQ FT. CHASSIS G.23-AE NO WINGS. AREA. 18.135 SQ FT SCALE 1/16. 30/1/33 | ||