Blueprint cross-section of a Frazer-Nash B.M.W. cylinder head with a hemispherical combustion chamber.
| Identifier | ExFiles\Box 134\1\ scan0043 | |
| Date | 9th November 1937 | |
| FRAZER - NASH B.M.W. CYLINDER HEAD HEMISPHERICAL COMBUSTION CHAMBER SCT. 71. E.D. 9.11.37. | ||
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).