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).
Test data for a Packard 1100 lbs. (O.S.) spring, detailing weight vs. deflection and positive camber.
| Identifier | ExFiles\Box 127\1\ scan0088 | |
| Date | 23th March 1920 | |
| 23.3.20. PACKARD SPRING 1100 lbs. (O.S.) No.2 - without clips. Positive camber 7.687" cwts. qrs. lbs. | Deflection. ------------------------------------- 2 3 14 | 1" 4 3 14 | 2" 7 0 0 | 3" 8 3 16 | 4" 10 3 7 | 5" 12 3 7 | 6" 14 3 0 | 7" 17 1 10 | 8" 20 0 0 | 8.687" Weight of spring 1 qr. 21 lbs. | ||