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).
Page 3 detailing vehicle road test feedback on brakes, axle, suspension, and performance.
| Identifier | ExFiles\Box 21\7\ Scan034 | |
| Date | 12th June 1925 | |
| R.R. 493a (50 H) (D.D. 31. 12-6-25) J.H.D. EXPERIMENTAL REPORT. -3- Expl. No. REF: Hg/Rm{William Robotham - Chief Engineer}2/LG231025 and suffered badly from vibrations due to a loose instrument board which prevented fair estimation of road shock absorbing capabilities. These appear to be good. Unaffected by braking. Excellent steering lock. BRAKES. On the whole - bad. Too much pedal travel, spongy feeling, too much pressure required for a good stop. Little braking on the front. Bad front wheel brake squeaks. Pedal practically on the boards for max. braking when it was only just possible to lock the rear wheels. REAR AXLE. Drive taken via torque tube. Spiral bevel pinions. The axle on the car tried was a bad one, having a very pronounced howl at all speeds on the overrun. SUSPENSION. The suspension on the car is quite good. The road holding qualities very good, there being little tendency to roll. COOLING. Fan driven by a friction drive off the front end of the camshaft. The friction load used was such that it was just possible to prevent the fan rotating with the hand when the engine was running slowly. ROAD PERFORMANCE. This is a very lively car. The engine is flexible, it being possible to remain in top gear most of the time in London tax traffic. contd :- | ||