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).
Graph sheet from a Phantom 98 N.K showing rear axle motion experiments comparing performance with and without shock absorbers on different road surfaces.
| Identifier | ExFiles\Box 17\1\ Scan076 | |
| Date | 25th November 1931 | |
| REAR AXLE MOTION EXPERIMENTS SHEET I PHANTOM 98 N.K M.P.H. SURFACE:- AVERAGE MAIN ROAD SHARDLOW STRAIGHT. 23 35 45 NO SHOCK ABSORBERS x 5.34 23 45 AXLE HEAVILY DAMPED x 2.68 SURFACE:- BAD POT-HOLES. BOLTON LANE. 23 NO SHOCK ABSORBERS x 5.34 12 35 HEAVY DAMPING x 5.34 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. ROLLS-ROYCE LTD EXPERIMENTAL DEPT 25 NOV 31 TSN. 29 10-28 | ||