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).
Table comparing the weights of chassis front end parts for various car models.
| Identifier | ExFiles\Box 127\1\ scan0267 | |
| Date | 1st May 1936 guessed | |
| CHASSIS FRONT END WEIGHTS. <1086> BENTLEY 25 HP. PARTS | lbs. | lbs. | Ph.II. lbs. Front axle with control (no brakes) | 49.5 | 60.3 | 87.5 2 road springs | 38.2 | 56.4 | 78.0 2 shock dampers | 22.75 | 23.0 | 23.0 Engine & radiator cross members | 10.25 | 13.0 | 18.5 Front cross member with forgings | 10.0 | 11.5 | 14.125 Rear spring anchorage brackets | 3.25 | 3.25 | 7.5 Front shackle | 1.5 | 3.5 | 3.75 TOTAL: | 135.45 | 171.0 | 232.375 Ph.III | WRAITH PARTS | lbs. | lbs. 2 top triangular levers | 17.5 | 17.5 2 bottom triangular levers | 20.75 | 18.0 2 yoke pieces | 15.5 | 8.5 2 spring pot assemblies | 106.25 | 105.0 Front cross member | 16.4 | 15.0 Front pan and rad. support | 58.1 | 50.0 Centre Stg. lever & x stg. tube | 19.5 | 16.5 Distance piece & flanges thru'frame | 26.0 | 32.0 TOTAL: | 280.0 | 262.0 WRAITH TORSION BAR PARTS | lbs. 2 top triangular levers | 14.0 2 bottom triangular levers | 14.0 3 piece cross steering | 22.0 2 shock dampers | 17.0 2 Torsion Bars | 20.0 Rear torsion bar supports | 8.0 Triangle brkts. anchorage to frame | 30.0 1st cross member and cross member | 15.0 / 20.0 TOTAL: | 160.0 PACKARD PARTS | lbs. Front cross member | 28.0 Centre Steering lever | 3.0 2 springs | 22.4 2 Buffers and Pots | 6.06 2 cross steering tubes | 2.44 2 torque arms | 13.5 2 shock dampers with top triangular lever. | 31.5 2 jack pads | 2.75 2 spherical housings for torque arm | 6.0 2 suspension arms and yoke pieces | 48.0 TOTAL: | 173.8 | ||