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).
Engineering notes and critique on the steering, suspension, and drivetrain of a Humber Car.
| Identifier | Morton\M4.1\ img017 | |
| Date | 10th December 1920 | |
| R.R. 828 A (100 T) (S.H. 788, 10-12-20) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2947 Humber Car contd:- -3- Steering. Reversible - heavy - no attempt to return. No wobbles - no heavy road shocks felt. Diameter of circle to turn car - Right hand 44 ft. Left hand 51 " 1" Lean of pivots. N.S. 3/16" } taken between 9 1/2' centres. O.S. 1/8" } Length from centre of front universal joint to centre of Rear axle - 61". C.A.V. Starter and Generator - separate units. Propeller shaft exposed fabric universal joints at each end. Battery slung from floor boards at side of propeller shaft. Thermo syphon cooling assisted by impellor mounted on fan spindle. Dynamo and Fan driven by one belt. Timing gears driven by silent chain. Electric starter operates on gear ring on flywheel. No breather to crankcase. Change speed and hand Brake quadrants carried on gear box. Hand brake shaft runs right through top of gear box. Gears overhang in gear box - very poor design - noisy. ------------------ Contd. | ||