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).
Notes on the headings and units for ride and roll rate tests carried out at Vauxhall.
| Identifier | ExFiles\Box 127\4\ scan0220 | |
| Date | 2nd January 1940 | |
| AWM/VLH. A.G.M. AWM/WDP. 1097. AWM.LU/JMS.2.1.40. c. Rm.{William Robotham - Chief Engineer} c. Ev.{Ivan Evernden - coachwork} Vauxhall Ride & Roll Rate Tests. Some notes on ride and roll rate tests as carried out at Vauxhall will doubtless be of interest. The result headings and units used make possible direct comparison with G.M. tests. The result headings vary to some extent, according to the type of suspension. Accordingly, headings for a car with independent front suspension with anti-roll bar and conventional rear suspension without anti-roll bar have been chosen. Notes on some of the headings are given later on. Section I. Vehicle - maker, type, chassis no. and description of suspension. Tyre size and make. Tyre pressures - front - lb/sq.inch. rear - " Kerb weight per wheel - front - lb. rear - " 4 Passengers add per wheel, front - " rear - " Unsprung weight. front - " rear - " 4 Passenger sprung weight, front - " rear - " Section II. Measured front ride rate with tyres - lb/sq.inch. and anti-roll bar. Measured front ride rate with tyres - lb/inch less anti-roll bar. Measured friction from graph. - lb. (this includes tyre friction) Suspension ride rate with anti - lb/inch. roll bar. ditto ditto less anti roll bar. - " Virtual deflection. - inches. Section III. Measured front roll rate with tyres - lb.ft/deg. and anti roll bar. ditto less anti roll bar. - lb.ft/deg. Tyre roll rate - lb.ft/deg. Front suspension roll rate with anti - lb.ft/deg. roll bar. ditto less anti roll bar. - lb.ft/deg. Anti roll bar effect. - lb.ft/deg. Measured roll rate less anti-roll bar Calculated. | ||