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).
Calculations for the change in weight fraction on the rear wheels of a car during deceleration.
| Identifier | WestWitteringFiles\K\November1923\ Scan67 | |
| Date | 12th July 1923 | |
| R.R. 493A (40 H) (SL 42 12-7-23). J.H., D.{John DeLooze - Company Secretary} EXPERIMENTAL REPORT. Expl. No. 1559 REF: Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}2/LG22.11.2 x = h tan θ = h wf / gW = hf{H. W. Frost - Coachwork Inspector} / g Required to find change in fraction of weight on the rear wheels for a dccn. of f.{Mr Friese} ft. per sec2. h = ht. of C. of G.{Mr Griffiths - Chief Accountant / Mr Gnapp} ins. l = wheel base of car ins. Now for a dcn. of f.{Mr Friese} ft. per sec.2 the line of action of the centre of gravity will cut the wheelbase h x f / g ins. more forward. Let the C. of G.{Mr Griffiths - Chief Accountant / Mr Gnapp} originally cut the wheelbase X" from the rear of the car where X < l/2 Then if W = total wt. of car, Initial wt. on rear wheels (a) = W x X / l lbs. If the C. of G.{Mr Griffiths - Chief Accountant / Mr Gnapp} moves forward hf{H. W. Frost - Coachwork Inspector}/g" (b) New fraction of wt. on rear wheels = (x + hf{H. W. Frost - Coachwork Inspector}/g) / l lbs. Fraction stationary x/l Fraction decelerating at f ft./sec2. = (xg + hf{H. W. Frost - Coachwork Inspector}) / gl{G. Linnett} Difference in fraction = x/l - (xg + hf{H. W. Frost - Coachwork Inspector}) / gl{G. Linnett} = hf{H. W. Frost - Coachwork Inspector}/gl{G. Linnett} | ||