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 high-speed braking problems, specifically relating to windage and rotational mass.
| Identifier | ExFiles\Box 160\2\ scan0064 | |
| Date | 12th October 1925 guessed | |
| HIGH SPEED BRAKING PROBLEMS WINDAGE OPEN TOURING CAR WT 2.2 TONS RETARDATION FT/SEC². DUE TO WINDAGE OF CAR. ROAD SPEED M.P.H. BRAKING EFFECT OF WIND ROTATIONAL MORE PEDAL PRESSURE WILL BE REQUIRED TO LOCK THE WHEELS SUDDENLY AT HIGH SPEEDS THAN AT LOW SPEEDS EXTRA WORK BRAKES ARE DOING DUE TO ROTATING MASSES GIVEN IN EQUIVALENT CAR DEC'N FT/SEC² ACTUAL CAR DECELERATION FT/SEC² FLYWHEEL & WHEELS FLYWHEEL ONLY WHEELS ONLY | ||