Chart of rear axle motion experiments for the Phantom 98 N.K. comparing different damping settings on various road surfaces.
| Identifier | WestWitteringFiles\S\September1928-October1928\ Scan207 | |
| Date | 29th October 1928 | |
| REAR AXLE MOTION EXPERIMENTS. — PHANTOM 98 N.K. SHEET 2 BURTON ROAD. RAILWAY LEVEL CROSSING COMING IN TOWARDS DERBY. 23 M.P.H. x 4.12 No DAMPERS. x 5.34 HARTFORDS ONLY SET AT 40 LBS. 35 M.P.H. x 8.88 No DAMPERS. HARTFORDS ONLY SET AT 40 LBS. BURTON RD. HUMP - BACK BRIDGE. M.P.H. GOING OUT, FROM DERBY. ALL X 11.6 35 AXLE HEAVILY DAMPED. NO SHOCK ABSORBERS 40 HEAVY DAMPING COMING IN TOWARDS DERBY. 35 HEAVY DAMPING NO SHOCK ABSORBERS. ROLLS-ROYCE LIMITED PRINT ROOM 31 OCT 1928 TSu. 29/10/28 | ||
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).