Blueprint showing three cross-sections of a front wing for model 15 EX.
| Identifier | ExFiles\Box 67\1\ scan0293 | |
| Date | 1st October 1928 | |
| FRONT WING SECTIONS - 15 EX. A FRONT POINT .400 1.100 1.350 .550 B REAR OF SIDE LAMP 18" FROM FRONT POINT 1.450 110° 1.100" 1.350 .077 1.500 C REAR 5' FROM FRONT POINT 1.000 1.000 1.250 .550 | ||
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).