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).
Comparative table of stress calculations for pivot and axle components on various car models.
| Identifier | ExFiles\Box 123\3\ scan0117 | |
| Date | 29th January 1934 guessed | |
| Pivot. Pivot. Axle. Headers: Stress due to vertical load. (Static). Comparative stress allowing for speed. Fig. of merit. Stress due to side skid (μ=.400) Fig. of merit. Stress at centre line of axle due to vertical load (Static) Comparative stress allowing for speed. Fig of Merit. Data: Bentley. 900 lbs. sq.in. 900 lbs. sq.in. 1.000 14,850 lbs.sq. in. 1.000 26,000 lbs.sq. in. 26,000 lbs.sq. in. 1.000 Vulture. 1065 sq. in. 1315 lbs. sq.in. .685 16,250 lbs.sq. in. .915 22,600 lbs.sq. in. 27,900 lbs.sq. in. .933 Phantom. 595 lbs. sq.in. 531 lbs. sq.in. 1.700 9,700 lbs.sq. in. 1.530 11,900 lbs.sq. in. 10,650 lbs.sq. in. 2.440 20/25. 29.7 lbs. sq.in. 20.6 lbs sq.in. 43.600 13,650 lbs.sq. in. 1.085 15,400 lbs.sq. in. 10,700 lbs.sq. in. 2.430 | ||