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).
Diagram of a 6-cylinder engine exhaust manifold, highlighting the 'Hot Spot'.
| Identifier | ExFiles\Box 122\3\ scan0102 | |
| Date | 1st October 1938 | |
| SCHEMA TUBULURE D'ECHAPPEMENT . MOTEUR 6 cyl . RICE Hot Spot ANNEXE 078 OCTOBRE 1938 | ||