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 requirements for fitting a Marles steering gear to a Bentley chassis.
| Identifier | ExFiles\Box 28\3\ Scan102 | |
| Date | 12th February 1935 | |
| XC994 To RHC.{R. H. Coverley - Production Engineer} Hs{Lord Ernest Hives - Chair}/FJH.{Fred J. Hardy - Chief Dev. Engineer}12/KW.12.2.35. Marles Steering On Bentley. We have ordered from the Adamant Engineering Co. a 1-7/16 Type Double Tooth Marles Steering Gear for trial on a Bentley chassis. Will you please prepare the necessary drawings for fitting this gear to a chassis, and fit when the gear is available. We attach a blue print of the gear and give below a list of the special features involved in the fitting to a Bentley chassis. (1) The axis of the rockershaft should coincide with the position of that of standard Bentley steering. (2) The box should be attached to the frame by a split clamping bracket as used for the Marles gear on 25 HP. (3) The pendulum lever should be 9.000 long, and for the purpose of positioning the splines it should be assumed that with the gear in its mid position a rockershaft spline is on the line AA{D. Abbot-Anderson} on the Adamant Drawing MGA.{M. G. Aspley}20620.B attached. The splines in the pendulum lever should be cut by the Adamant Engineering Co. (4) The lower cover of the box, part No:M20722, will be supplied 0.200 thick so that we can fit the stationary control tube by 2-B-A studs. (5) The upper cover of the box, part No.M20718, will be supplied 1.000 longer than shown and will be turned on the outside dia. for the attachment of an R.R. steering column. We do not yet know the dia. to which this will be turned but will let you know as soon as possible. (6) The steering column should be of Peregrine type. | ||