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 Spring showing deflection measurements under various loads.
| Identifier | ExFiles\Box 127\1\ scan0085 | |
| 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" 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. EX.D MAR 26 1920 RECEIVED | ||