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).
Graphs from rear axle motion experiments on a Phantom 38 NK, testing different speeds, surfaces, and shock absorber settings.
| Identifier | WestWitteringFiles\S\September1928-October1928\ Scan208 | |
| Date | 29th October 1928 | |
| REAR AXLE MOTION EXPERIMENTS. SHEET I PHANTOM 38 N.K. SURFACE - AVERAGE MAIN ROAD. SHARDLOW STRAIGHT. M.P.H 23 NO SHOCK ABSORBERS. x 5.34 M.P.H 35 M.P.H 45 MAIN ROADS UNDAMPED. SWAYING AMPLITUDE 2.5" Vel. approx 2.5 ft/sec M.P.H 23 AXLE HEAVILY DAMPED. x 2.68 M.P.H 45 SURFACE - BAD POT-HOLES. BOLTON LANE. M.P.H 25 NO SHOCK ABSORBERS. x 5.34 M.P.H 23 HEAVY DAMPING x 5.34 M.P.H 35 HORIZONTAL SCALE IS TIME & EQUALS APPROX .7 SECS PER INCH. - VERTICAL SCALE IS AXLE MOVEMENTS, & SHOULD BE MULTIPLIED BY THE RATIOS SHOWN. (E.G. x 5.34) TO GET ACTUAL MOVEMENT OF AXLE IN INCHES. A DOWNWARD MOTION OF THE PEN, MEANS DOWNWARD MOVEMENT OF THE AXLE. THE SMALL FIGURES BENEATH THE GRAPHS, GIVE THE AXLE VELOCITY IN FT/SEC. AS OBTAINED FROM THE SLOPE. STAMP: RECEIVED 31 OCT 1928 DERBY | ||