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).
Note confirming discussion points on the Peregrine Steering Column, including control tube diameters, securing nuts, and bolt sizes.
Identifier | ExFiles\Box 2\2\ B002_X 115 150-page16 | |
Date | 4th January 1933 | |
Y 150. To BY.{R.W. Bailey - Chief Engineer} from E.{Mr Elliott - Chief Engineer} E.5/HP.4.1.33 ---------- c. Wer. Hs.{Lord Ernest Hives - Chair} Pa.{Mr Paterson} re Peregrine Steering Column - N.Sch.3628. --------------------------------------- This note confirms discussion with Da.{Bernard Day - Chassis Design} concerning a number of outstanding points as follows: No.1. Diameter of Control Tubes - We find from some experience of RHC.{R. H. Coverley - Production Engineer} that the control tubes cannot be less than .040 thick without danger of crushing at the point where control levers are attached by a pinch bolt, also there is danger of burning when brazing on the top levers. This thickness can however be used with .625" o/d if the central tube can be .250" o/d, and the requisite clearance between the tubes can be maintained at the present figure .014". We are accordingly obtaining some samples of .250 o/d tube and conductor suitable for the Klaxon, with a view to determining if these dimensions are practicable. It is clear that Klaxon cable, which we understand does not exceed .160 in diameter, must be free at all times in the central tube. If we have to revert to the present outside diameter of control tube assembly, well then the second thread shown on N. Sch. 3628 must be used and modifications to the steering shaft will also be required and the hole at the top and near the steering wheelhas to be modified also to accommodate the larger diameter of taper. No.2. It is intended that the nut on the outside of the frame securing the steering box should be locked by a thin tab washer prevented from turning by a groove on the steering box extension, a tab being provided in the bore of the thin locking washer which can be turned in under the thick washer. No.3. It is agreed that 2-BA bolts are rather smaller than desirable for securing the steering box to the steering box extension, and 1-BA should be used here instead. No.4. A Luvax nipple on the steering box bracket will be required if the side steering tube joint is to be taken care of by the central lubrication supply as on the 20/25 chassis. | ||