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).
Attempts to resolve customer complaints of 'spitting' and explosions in the silencer for chassis 91-GN.
| Identifier | ExFiles\Box 47\3\ Scan243 | |
| Date | 16th October 1931 | |
| 14117. C.Hs{Lord Ernest Hives - Chair} from Mx.{John H Maddocks - Chief Proving Officer} MX{John H Maddocks - Chief Proving Officer}3/T16.10.31. Chassis No.91-GN - Captain H.A.Taylor, Sutton Hall, Thirsk. With reference to your memo Hd{Mr Hayward/Mr Huddy}/WW2/KW15.10.31. In the first instance this customer complained of the "spitting" in silencer on the overrun. This was overcome with special carefully fitted throttle disc. He then complained of explosions in silencer at the moment of opening throttle after "luffing". We have been able to definitely overcome this latter feature by using a throttle with positive opening with adjustable aperture, .5" dia. low speed choke and modified shape of low speed jet spindle which enables the low speed jet to be strengthened but not weakened off. Up to the present we have not been able to overcome both the features the customer complains of. With the scheme which prevents popping when opening up, we get a constant series of very subdued explosions when the silencer is hot, when over running. It must be appreciated that this customer is asking for the elimination of a feature which is present on every one of our cars. Hd.{Mr Hayward/Mr Huddy} tried the test car with the modification above referred to yesterday and in his opinion it would be no good offering this to the customer. Therefore it would seem that we have no alternative but to submit the matter to Sales and to admit that we cannot overcome the customer's complaint. MX{John H Maddocks - Chief Proving Officer} [STAMP: RECEIVED 1931 - OCT] | ||