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).
The specifications for bumper pads on dumb irons, including approved alterations.
| Identifier | WestWitteringFiles\U\2January1930-September1930\ Scan043 | |
| Date | 10th March 1930 | |
| To BY.{R.W. Bailey - Chief Engineer} From Da.{Bernard Day - Chassis Design} c. to HS.{Lord Ernest Hives - Chair} ORIGINAL Da.{Bernard Day - Chassis Design}1/MJ.10.3.30. BUMPER PADS ON DUMB IRONS. filed X4522 Herewith we send N.Sch.3044 and 3045 shewing the pads for bumpers applied respectively to the front and rear dumb iron. MR. Olley has approved of the height from the ground for the bumper given by this position and also of the alteration from .375 to .312 bolts. In other respects the fixing is the S.A.E. standard and we now have to apply to it some English types of bumper for use in this country. We have also to provide a suitable cap for use when there is no bumper. Da.{Bernard Day - Chassis Design} | ||