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).
Test results for the 49-GB car regarding the Dorris scheme and hot-spot throttle.
| Identifier | ExFiles\Box 50\3\ Scan264 | |
| Date | 10th April 1923 | |
| X4305 Mr. Hives from GWH. {George W. Hancock - Head Chateauroux} 10.4.23. 49-GB CAR. Tests to prove whether Dorris scheme is required with hot-spot throttle. Amount of petrol collected in auxiliary tank after starting up from cold :- 4 C.I. GWH. {George W. Hancock - Head Chateauroux} | ||