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).
Mr. Royce's instructions for testing the RR. E.16 engine without a supercharger, including alternative damping and carburetion methods.
| Identifier | ExFiles\Box 42\1\ Scan098 | |
| Date | 11th December 1925 | |
| To BY.{R.W. Bailey - Chief Engineer} from E.{Mr Elliott - Chief Engineer} c. to CJ. RG.{Mr Rowledge} Hs.{Lord Ernest Hives - Chair} 43826 E2/M11.12.25. RR. E.16. X.4114 X.4550 X.3820 With regard to testing RR. E.16. would you kindly note Mr. Royce wishes to start running this engine without the supercharger, and does not propose to send the revised ratio of supercharger drive, having 5 to 1 multiplication, until later. He would like you to rig up each induction pipe with its own carburetter. These latter can be easily obtained, since all that is required is a simple carburetter of the right bore. With regard to the absence of damping in the timing gear drive due to the removal of the supercharger, Mr. Royce proposes that we should first use a stronger flexible driving shaft than the one shewn up to now, and run the drive otherwise unaltered. If this should not prove satisfactory we have an alternative scheme whereby a friction device can be added on to the tail end to damp out any periodic vibration between the crankshaft and the timing gears. We should be glad if you would kindly prepare the necessary drawing for testing the engine with 4 simple carburetters as described. With regard to the schemes sent through for the carburetters on the supercharger Mr. Royce does not wish you to go on with the adapters as shewn. The supercharger connections were arranged for a double carburetter in which the float chamber occupied a space between the throttles, contd :- | ||