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).
Scheme 3341, which shows a modification to the rear dumb iron, spring shackle, and frame side member.
| Identifier | ExFiles\Box 104\3\ scan0145 | |
| Date | 12th September 1931 | |
| X5380 BY.{R.W. Bailey - Chief Engineer} FROM DA.{Bernard Day - Chassis Design} C. to SG.{Arthur F. Sidgreaves - MD} HS.{Lord Ernest Hives - Chair} J.{Mr Johnson W.M.} 3. FRAME. DA{Bernard Day - Chassis Design}2/M12.9.31. Herewith we send N. scheme 3341. shewing the rear dumb iron and spring shackle. It will be noticed that it slightly modifies the shape of the back end of the frame side member. DA.{Bernard Day - Chassis Design} | ||