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 list of various vehicle components and assemblies.
| Identifier | ExFiles\Box 126\2\ scan0181 | |
| Date | 3rd August 1939 guessed | |
| -2- Item No. GROUP. Humber B.V. Difference S.S. lbs. Al. engine lbs. lbs. Humber Saving. B.V. Saving. 15. Frame & Fittings, step irons 227 368 141 wing stays, engine mountings & rubbers. 16. Fuel system (including pump 25.1 43.1 18 on B.V.) (6 lbs) 17. Exhaust system. 33.8 58.8 25 18. Chassis electrical & Instru- ments (less electrical units 114.2 138.3 24 on engine) 19. Wheels & tyres (4 only) 214.5 238 23.5 B.V. 6.5 x 16. Humber 6.0 x 16. 20. One shot lub. system. 18.7 18.7 21. Radiator with shell bkts. 71.6 75 3.4 tierods etc. 22. Bonnet. 47 57 10 23. Bumpers, bkts. jack rests. 50.7 51.5 .8 24. Pressed steel dash. (part of 16.5 16.5 Humber body) 25. Centre floor board, apron, sundry 37.5 37.5 bkts. 26. Damper control. 6.5 6.5 27. Spare wheel & tyre. 53½ 59.5 6 28. Tools, starting handle jack. 23.1 22.6 .5 Sum of above, chassis dry 2272 2566 29. Chassis items unaccounted for 124 124 for 9.B.V. chassis weighed 2690 dry. 30. + petrol, oil, water approx. 130 154 | ||