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).
Breakdown of the weights of noise insulation materials fitted to a standard Bentley car.
| Identifier | ExFiles\Box 84\1\ scan0363 | |
| Date | 29th March 1935 | |
| To Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} c. to Hs{Lord Ernest Hives - Chair}/FD.{Frank Dodd - Bodies} x204 Hs{Lord Ernest Hives - Chair}/Wym.{G. Harold Whyman - Experimental Manager}10/KW.29.3.35. Body Weights. The following list represents the approx. weight added to a standard Bentley car with the noise insulation scheme fitted. The figures have been arrived at by measuring the amount of felt used and calculating on the basis of a square foot of 1/4" thick felt weighing 1 1/4 ozs. and 1/2" thick felt weighing 3 1/2 ozs. Felt on dash 1 lb. 8 ozs. Fibre on dash 2 lbs. 0 ozs. Felt on scuttle 2 lbs. 3 ozs. Felt on floor-boards, surfaces and rear foot wells 2 lbs. 4 ozs. Felt round whole of boot, seat squab and rear panel 4 lbs. 3 ozs. Felt and rubber mat weighs in excess of present sorbo mat 2 lbs. 0 ozs. Steel rear seat board covered with felt (actually weighed) 12 lbs. 0 ozs. Aluminium rear seatboard covered with felt (actually weighed) 7 lbs. TOTAL = 26 lbs. 2 ozs. 21 lbs. 2 ozs. Hs{Lord Ernest Hives - Chair}/G.H. Whyman. | ||