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 of a water hot spot on a B.80 induction pipe, with a proposed welded sheet aluminium water jacket.
| Identifier | ExFiles\Box 124\1\ scan0086 | |
| Date | 27th April 1939 guessed | |
| RM{William Robotham - Chief Engineer} 590 WATER HOT SPOT. B.80. INDN. PIPE. PROPOSED WATER JACKET FROM SHEET ALUM. WELDED IN POSTION. AM 690 CTS{C. Trot Salt - Carburation} | ||