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).
Two graphs illustrating braking performance, showing extra work due to rotating masses and retardation from windage.
| Identifier | WestWitteringFiles\N\2October1925-December1925\ Scan47 | |
| Date | 3rd October 1925 guessed | |
| Left Graph: EXTRA WORK BRAKES ARE DOING DUE TO ROTATING MASSES. GIVEN IN EQUIVALENT CAR DEC'N FT/SEC.². Y-Axis: ACTUAL CAR DECELERATION FT/SEC.². Line Labels: FLYWHEEL & WHEELS, FLYWHEEL - ONLY, WHEELS ONLY. Side Note: ROTATIONAL. MORE PEDAL PRESSURE WILL BE REQUIRED TO LOCK THE WHEELS SUDDENLY AT HIGH SPEEDS THAN AT LOW SPEEDS. Right Graph: HIGH SPEED BRAKING PROBLEMS. RETARDATION FT/SEC.² DUE TO WINDAGE OF CAR. Y-Axis: ROAD SPEED M.P.H. Line Label: BRAKING EFFECT OF WIND. Car Details: OPEN TOURING CAR. WT 2.2 TONS. | ||