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 plotting load versus rebound to show tyre and spring deflections with and without a roll rod.
| Identifier | ExFiles\Box 151\2\ scan0307 | |
| Date | 9th June 1936 | |
| GAE 20 TYRE AND SPRING DEFLECTIONS (5 1/2" INITIAL DEFLECTION SPRINGS) LBS LOAD ON FRONT WHEELS 2,200 2,000 1,800 1,600 1,400 1,200 1,000 REBOUND 3" 2" 1" NORMAL POSITION 270 LBS PER INS 305 LBS PER INS FIG. 1 WITH ROLL ROD Δ = 5.9" WITHOUT ROLL ROD Δ = 6.66" | ||