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 for a 40/50 model exhaust heated throttle for use in existing induction pipes.
| Identifier | ExFiles\Box 50\3\ Scan201 | |
| Date | 19th October 1921 | |
| [ "40/50. EXHAUST HEATED THROTTLE", "TO USE IN EXISTING INDUCTION PIPES", "E20816", "E20811", "E20812", "E3379", "E20813", "ROLLS-ROYCE, LIMIT", "PRINT ROOM.", "19 OCT. 1921", "DERBY", "11652/650", "10.F" ], | ||