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).
The design features of a supercharger, including petrol management, construction, and engine speed limitation.
| Identifier | ExFiles\Box 173\3\ img042 | |
| Date | 4th April 1934 guessed | |
| the only heat now used being a water jacket round the blower. Petrol Building up in Blower. They have an ingenious scheme for preventing petrol building up in the blower, they also have a continuous downward slope from the carburetter to the intake ports to ensure that any liquid fuel is drained away. Construction of Supercharger. The rotor is a simple un-machined casting. There is no spring drive in the system except the couplings, there is no slipping clutch. It is understood that in production quantities of about 1000 the unit will cost about 25/-. Limitation of Engine Speed. As previously mentioned, this is arranged by allowing the valves to bounce at 5000 R.P.M. The power falls off before then due to the fixed choke carburetter. Do not recommend restriction by valve or induction pipe sizes. Blower Efficiency. Graham Paige have designed and built this Blower themselves with a little assistance from one of Duesenbergs. | ||