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).
Exhaust system breakage and engine mounting faults for a 25/30 HP vehicle.
| Identifier | ExFiles\Box 108\3\ scan0142 | |
| Date | 11th March 1938 | |
| RR 600a - To. Rm.{William Robotham - Chief Engineer} C. Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager} (crossed out) CHATEAUROUX. I./.II.3.38. Handwritten: Da{Bernard Day - Chassis Design} Will you please deal with these faults Rm{William Robotham - Chief Engineer} 26.G.VI.- 25/30 HP. Exhaust System, Engine Mounting, Etc. Breakage of the outlet pipe from the front expansion box was reported in the Daily Report of 6.3.38. It was a fairly clean break immediately behind the front box. The box in question was the one sent out last year as a spare for the car during its first 10,000 miles test, and not used on that occasion. It was fitted on 28.2.38 and had covered 2,421 miles. We are not sending it back to you until we have another spare, in case we need the bits for replacement to keep the car running. The box now fitted is the spare sent out with the car this year. We have fitted the new torque reaction member to GCD.517. We have made the following observations :- 1) The nut which holds the fore and aft stay fouls. We have made this as thin as possible and may have to replace it by welding (marked (I) on drawing). 2) The centre lines of the studs in the gearbox are not parallel with the centre line of the cross member, causing insufficient clearance between the torque member and the cross member at N.S.F. and O.S.R. corners of member (marked (2) in drawing). We have slotted the stud holes to correct for this. 3) The end brackets which carry the rubbers have bent, due to the load and lack of stiffness. Flanged edges are required (marked (3) in sketch). 4) Special clamps to compress the rubbers would facilitate assembly. The mounting has been most effective in preventing the side shake complained of and the ill effects associated with it, but has introduced a lot more roughness. This may be due to one or more of the following :- A.{Mr Adams} Fouling between torque member and cross member. B. Too much pre-load on rubbers (0.125") C. Rubber durometer hardness too high. Handwritten note on right side: M.S. pipes can't be used for this section? There seems no use in attending to any of these points until the permanent scheme is running. Da{Bernard Day - Chassis Design} Handwritten note on bottom right: all this refers to the temporary scheme. | ||