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).
Table detailing spring combinations with corresponding load, rate, and stress values.
| Identifier | ExFiles\Box 95\3\ scan0027 | |
| Date | 7th September 1934 guessed | |
| SHEET (4) TABLE II - CONTINUED. No. of Combination | Outer Spring Designation | Inner Spring Designation | Normal Load at Wheel | Rate at Wheel | Max. Stress Outer and Inner. ---|---|---|---|---|--- 13 | D.O. | A.1. | 1141 lbs. | 111.2 lbs/in. | 112,700 lbs in.² outer. 14 | D.O. | B.1 | 1149 lbs. | 110.2 lbs/in. | 112,700 lbs/in²outer 15 | D.O. | C.1. | 1220 lbs. | 120.3 lbs/in. | 112,700 lbs/in²outer 16 X | D.O. | D.1. | 1250 lbs. | 124 lbs/in. | 112,700 lbs/in²both. X - Indicates combinations as designed. | ||