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 of engine components between Humber and R.R. models.
| Identifier | ExFiles\Box 126\2\ scan0188 | |
| Date | 31th August 1939 guessed | |
| ENGINE. HUMBER. R.R. lbs.ozs. lbs.ozs. Dynamo .................... 22 15 23 14 Starter ................... 29 0 24 12 Distributor ) Vacuum Control) ........... 3 14 3 5 Vernier Control.) Coil ...................... 2 5 1 12½ Ballast ................... - 3 Dynamo Straps ............. 15½ 10 Distributor Head ) H.T.Leads & Tube ) ......... 2 4½ 2 4½ ______ ______ 61 6 56 13 Extras - Coil ............. 1 12½ ______ ______ 61 6 58 9½ = -2 12 lbs.ozs. lbs.ozs. - Carried forward 16 4 + 13 8 - 2 12 Extras 4 14 ______ ______ Total .. 13 8 Total .. 8 10 heavier. ======== ======== -3- | ||