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 outlining methods for calculating acceleration and velocity, both by time and by speedometer readings.
| Identifier | ExFiles\Box 113\2\ scan0025 | |
| Date | 15th January 1923 guessed | |
| Methods of calculation. By TIME Let v = final velocity. Let f = acceleration. " u = initial velocity. " t = time. s = space passed over. Now initial velocity + accn. X time = final velocity } (i) i.e. U + ft = v Also space passed over = average speed X time } (ii) i.e. s = (v + u)/2 X t Substitute (i) in (ii) S = ((U + ft + U)t)/2 = (2ut + ft^2)/2 :. S = ut + 1/2 ft^2 :. Average acceleration = (2S - 2ut)/t^2 by time By speedometer. Average acceleration = (Change of velocity(ft/s)) / (time(Secs)) = f/s^2? Let initial speed be N m.p.h. " final " " M m.p.h. Time = t secs. Then acceleration = ((M - N) 14.65) / t by speedometer. [Watermark: MADE AT CROXLEY] | ||