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 showing the cushioning capacity of a 6.00-16 Fort '90' tyre at various inflation pressures and rim widths.
| Identifier | ExFiles\Box 157\2\ scan0085 | |
| Date | 1st November 1936 | |
| CUSHIONING CAPACITY. D.S. 6489. 6.00-16 FORT '90' Cushioning Capacity = m-ms increase in deflection per cwt. increase in tyre load x 100. Taken in region of normal loading for the inflation pressure. CUSHIONING CAPACITY 15 lbs/□" 20 lbs. 25 lbs. 30 lbs. 35 lbs. TYRE LOAD = 870 lbs. RIM WIDTH - INCHES P.D.D. Nov. 1936 KINWEST A.C.T M | ||