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 of stiffness measurements in lbs.ft/degree for various Bentley III frame configurations.
| Identifier | ExFiles\Box 86\4\ scan0226 | |
| Date | 25th October 1937 | |
| -2- BENTLEY III. 25.10.37. Stiffness. lbs.ft/degree Between Dash to Dash to wheel planes. rear wheels. front wheels. Frame No.1 - .128" thick bolted 1500 3000 3000 " with welded gussets 1700 3320 3670 " all welded 1750 3320 3670 Frame No.2 - .128" thick bolted, with standard gusset 1450 2800 3000 Frame No.2 - gussets with lightening holes. 1400 2750 2850 " " as above plus holes in side members 1360 2610 2850 " " lipped holes in ) gussets & holes in side ) 1400 2610 3020 members) Frame No.3 .104" thick bolted 1150 2167 2480 " with welded gussets 1350 2460 3000 " " gussets & centre ) of cross welded, ) 1420 2700 3000 plate in centre of ) cross .225" thick.) | ||