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).
Considerations for fitting a twin exhaust system to a 3.B.50 chassis.
| Identifier | ExFiles\Box 111\3\ scan0059 | |
| Date | 17th March 1939 | |
| Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager} (crossed out) C. Rm.{William Robotham - Chief Engineer} 8006 S33 DA.{Bernard Day - Chassis Design}14/G.17.3.39. TWIN EXHAUST SYSTEM - CHASSIS 3.B.50. Attached herewith is a blueprint of E.CD.719 showing a ½ scale layout of a dual exhaust system applied to a Bentley V.{VIENNA} chassis with a Bentley lll engine, as requested. The four silencers shown are Burgess 18.00" long x 6.000" deep x 3.800" wide. We understand that you wish to apply this system to three B.50 chassis fitted with a B.60 engine, and the following points should be borne in mind. B.50 chassis is 6.000" longer than the B.V.chassis shown on layout, the extra length being in the centre cross portion of frame. The downtake pipes should be made suitable for the B.60 engine in regard to shape and diameter, as the engine shown on E.CD.719 is a Bentley lll engine. Approximate positions of the supports for the system are shown on the layout, and number of additional holes are required in the chassis frame to allow the exhaust pipes to pass through. If the modified rear road spring anchorage with lower rear tubular cross member is fitted to 3.B.50 the tail pipes and their supports will need altering to suit. As the rear axle of the B.50 has a much greater range of movement than that shown on the drawing for the B.V. car, it will be necessary to either carry the exhaust tail pipes over the axle maximum bump position, or to lower the pipe to clear the axle rebound position, leaving very little ground clearance. DA.{Bernard Day - Chassis Design} | ||