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 and speedometer test results for a 4 1/4 Litre Bentley Trials Car.
| Identifier | ExFiles\Box 88\2\ scan0160 | |
| Date | 26th February 1936 | |
| Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer} from Mx.{John H Maddocks - Chief Proving Officer} x260 Mx{John H Maddocks - Chief Proving Officer}12/T26.2.36 4 1/4 Litre Bentley Trials Car originally B-83-FC (3 1/2 Litre) now B-3-GA Here are the particulars you asked for in connection with the above car:- Weight of Car with two people and 8 gallons of petrol, 1 ton. 15 cwts. 2 qrs. 7 lbs. Effective tyre diameter 28.6" India Super Tyres 550 X 18 - 30 lbs pressure. The speedometer reading is 7 1/2% fast at a maintained speed of 30 m.p.h. on London road. Tested as an instrument on the bench at 752 turns = 60 m.p.h. which, although on the high side complies with the limits laid down, which are 732 to 766 at 60 m.p.h. | ||