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).
Calculation sheet detailing stress, load, and deflection data for various plate thicknesses.
| Identifier | ExFiles\Box 43\2\ Scan200 | |
| Date | 28th September 1937 guessed | |
| - 5 - Plate thickness. Bend to radius. Desired initial radius. Stress 1/2" neg. (lbs/in²) Load at cent. bolt. 1/2" neg. (lbs) Final stress. 3.1" neg. (lbs/in²) Increase in stress. 1/2" neg. to 3.1" (lbs/in²) Increase in load. 2.6" deflection. (lbs). Main (.285) 165" 236" 27,150 67.5 74,200 47,050 117 One .250 70" 80" 55,300 105.6 96,650 41,350 79 six .218 50" 60" 61,420 89.2 97,500 36,080 52.5 six .187 45" 49" 63,030 67.9 93,900 30,870 33.3 Total 1115.7 Multiplied by 1.05 = 1170. i.e. there will be no difficulty in getting required normal load. 2.6 | 710.8 274 274 x 1.15 = 315. i.e. we shall expect to get a stiffness, before clipping to the axle, of about 315 lbs/in. The actual results are shown on print A.9809. | ||