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).
Graph plotting the reduction of diameter against degrees from the major axis.
| Identifier | ExFiles\Box 170\2\ img232 | |
| Date | 17th December 1934 guessed | |
| REDUCTION OF DIAMETER .000" .001" .002" .003" .004" .005" .006" .007" .008" MAJOR AXIS DEGREES FROM 9° 18° | ||