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 detailing two versions of a Throttle Flange Joint for different engine sizes.
| Identifier | ExFiles\Box 131\4\ scan0281 | |
| Date | 9th June 1937 guessed | |
| 4¼ LITRE 3/8” STUDS & NUTS THESE ENDS ARE SQUASHED IN. 3½ LITRE 5/16” STUDS & NUTS THROTTLE FLANGE JOINT. ENCLOSURE Nº 880 "JUSTSO" | ||