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).
Analysing front braking proportions, weight transference, and associated physics calculations including a free-body diagram.
| Identifier | ExFiles\Box 121\1\ scan0205 | |
| Date | 4th February 1940 guessed | |
| 2. front Craking a I must agree with him in this instance. The theoretical proportions F/R are about 1.35/1, but whereas the R is only 80% efficient the front is only 70% a this reduces the ratio considerably. On Big Bertha Waller used 1.75/1 before he got satisfaction - if you use less than this on 8 cyl. cars I think you will be in perpetual trouble, of one sort or another. Chapham can produce figures of weights F & R from his 3. spring book & in addition you must allow for a 25% weight transference on braking. The front weights keep up to 1100 lbs per wheel (in one case) for a corresponding rear weight of 950 lbs, (11 B IX) this is even more necessary. Taking the case of a car with C of G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2'-0" above ground a 10'-0" wheelbase, μ = 1.0 we got a weights equal F & R we get [Diagram Text] Top Right: 32 f/s/s (W) Left Diagram: MRR, RR, W Right Diagram: MRF, RF | ||