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).
Weight comparison table for vehicle components between a Studebaker and an 'E type' estimate.
| Identifier | ExFiles\Box 127\5\ scan0002 | |
| Date | 17th August 1939 guessed | |
| Studebaker Weight | % | Latest estimate E type. (9) Steering Gear with wheel drop arm and cross link (Ross 2 pin gear) | 24.42, 30 1 3/4 | 1.01 | 24 (10) Wheels and tyres. 5 wheels 18.18, 5 (5 1/2 x 16) tyres at 20.33, 4 caps, Spare wheel clips | 90, 101, 5, .76, 196.76, 201.12 | 8.27 | 65, 105, 6, .5, 176.5 (11) Chassis sheet metal | 119.87 | 4.97 | 96 (12) Chassis electrical Battery & leads, battery supports all lamps including directional signals, horn switch and wiring (up column). Chassis wiring and switches. Facia panel and instruments & speedo cable. | 69.73, 6 volt, 72-7 1/2 | 2.9 | 78, 12 volt. (13) Radiator & shell. Core, Shell & bolts | 24.24, 37.01, 61.2, 94 | 2.59 | 22.5, 22.5, 45 (14) Final assembly. Bumpers, Miscellaneous | 38.83, 28.26, 67.0, 59 | 2.79 | 29.45, 19.55, 49 | ||