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).
Standardisation and application of a noise insulation scheme for the 4¼-litre Bentley chassis.
| Identifier | ExFiles\Box 138\1\ scan0233 | |
| Date | 12th March 1936 | |
| To E.{Mr Elliott - Chief Engineer} from G.{Mr Griffiths - Chief Accountant / Mr Gnapp} Copy to Sg.{Arthur F. Sidgreaves - MD} " " Wsr. " " Hs.{Lord Ernest Hives - Chair} " " Sy. x1160 BENTLEY C.S/MK.12.3.36. Noise Insulation on 4¼-litre Bentley. Your Ref: E.S/HP.7.3.36. We understand that it is considered desirable to apply a noise insulation scheme to the 4¼-litre chassis. We are quite agreeable to the standardisation of a scheme provided the weight is not unreasonable. Towards the end of last year, Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} prepared details of an abbreviated scheme for the Bentley calculated to weigh about 24 lbs. instead of the original 50 lbs., but I understand that since then further investigations have been made and that the scheme you would now recommend would differ materially from that put forward by Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Further, I understand that the scheme you would now advise can only be applied after the body is mounted and consequently must be fitted up by the coach-builder. I would like to have quickly full particulars of this new scheme as well as its estimated weight so that coach-builders may be instructed to apply it. In the meantime, to take care of the majority, at any rate, of the early 4¼-litre cars, we are arranging to show, as far as we are able to do so, our trials car, B.2-GA, to the coach-builders concerned so they can copy the scheme you applied to this car when it was recently converted from a 3½-litre to a 4¼-litre. There are two most important points in connection with this noise insulation scheme. They are :- (a) the necessity for so mounting those parts carried on the dashboard, like the autovac tank, petrol pump etc., that they may be readily dismantled without its first being necessary to strip the noise insulation material from the dash. We recently had a case where it took about eight hours to | ||