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 J. 3. cross steering levers for use with 18' wheel rims.
| Identifier | ExFiles\Box 179\1\ img198 | |
| Date | 31th December 1931 | |
| FROM DA.{Bernard Day - Chassis Design} C. to HS.{Lord Ernest Hives - Chair} J.{Mr Johnson W.M.} 3. CROSS STEERING LEVERS WITH 18" WHEEL RIMS. X5430 With further reference to BY11/C41231., we send herewith N. sch. 3402. showing how we suggest the matter of the smaller wheels can be dealt with without appreciable loss of steering lock. Since it is impossible to get the steering joint between the rim and the brake drum we suggest that it should be taken definitely outside the former, and the lever lengthened so as to reduce the angle of the cross steering lever until it is approximately as at present. With the increased lock which we expect to get from the smaller wheels and wider track we are able to reduce the turning circle a small amount in spite of the slightly inferior geometry. The theoretical turning circles are 42.15 ft. for the present 20/25., and 40.4 ft. for the J.{Mr Johnson W.M.} 3. as proposed on N. sch. 3402. We have indicated on N. sch. 3403, that we can stand the lengthening of the cross steering lever. It will be evident that it would be an advantage to reduce the overhang of the joint of the cross steering lever, and on N. sch. 3404. we will make some suggestions as to how this could be done. We anticipate that we should be able to reduce the circle to approximately 38 ft. if we could treat the cross steering tube joint in this way. This is without increasing the maximum lock on the axle, and therefore does not present difficulties with the brake gear, shock dampers, etc. We suggest that N. sch. 3402. should be proceeded with until we can get a verdict on the proposals on N. sch. 3404. DA{Bernard Day - Chassis Design} | ||