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).
Issues and required modifications for 'Corniche' exhaust fittings.
| Identifier | ExFiles\Box 97\3\ scan0104 | |
| Date | 10th May 1939 | |
| BY/NS.{Norman Scott} c. Rm.{William Robotham - Chief Engineer} c. Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager} c. Da{Bernard Day - Chassis Design}/TWD.{T. W. D???Aeith} c. Da{Bernard Day - Chassis Design}/JD.{J. Draper - Frames} 400C DA.{Bernard Day - Chassis Design}12/G.10.5.39. "CORNICHE" EXHAUST FITTINGS. Please receive herewith :- E.CD.1354 Exhaust Downtake and Intermediate Pipe - Corniche. The 3" diameter downtake pipe which continues rearwards as far as the front silencer, is the size suggested by the Experimental Department to reduce the power loss to a minimum. This large diameter pipe is difficult to fit in the available space, and causes the following inconveniences:- (1). There is not sufficient clearance to enable the dynamo and starter motor brush covers to be removed in position on the engine. (2). The downtake pipe will have to be disconnected from engine to facilitate removal of starter motor set screws to enable starter motor or clutch casing to be removed. (3). Clearance between downtake and frame gusset is small, also between pipe and starter motor housing. (4). A new engine breather pipe is necessary. (5). The rear engine torque bracket fixed to frame gusset is altered. Will Da{Bernard Day - Chassis Design}/TWD.{T. W. D???Aeith} please note this. (6). It is necessary to alter the holes in the various members of chassis frame through which the exhaust pipe passes. Will Da{Bernard Day - Chassis Design}/JD.{J. Draper - Frames} please note this. (7). The assembly of the downtake pipe in chassis with engine in position will be more difficult, it may be necessary to make the pipe in two lengths with a joint flange just rearward of the rear engine support crossmember; this can only be demonstrated by trial. The design of the front silencer to suit this downtake is in hand, and will be issued shortly. | ||