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).
Various designs and cost comparisons for Bentley III side and cross steering tubes.
| Identifier | ExFiles\Box 87\5\ scan0222 | |
| Date | 30th November 1936 | |
| To BY.{R.W. Bailey - Chief Engineer} Copy to Da.{Bernard Day - Chassis Design} Rm.{William Robotham - Chief Engineer} RHC.{R. H. Coverley - Production Engineer} RHC{R. H. Coverley - Production Engineer}/HPS.{Horace Percy Smith - Experimental Factory Mgr} F.J. HARDY Bentley III Side and Cross Steering Tubes. -------------------------------------- We have already sent to you N.Sch.4920 showing an adjustable forward end to the Bentley III side steering tube used in conjunction with a butted tube. Subsequently we have sent to you a similar design using the same ball joint, with the threaded end obtained by brazing a forging on to the end of a plain tube. Since then we have received with RHC.{R. H. Coverley - Production Engineer}2/CB.18.11.36, a print of EX.25145 showing a plain tube with a screwed end. We send herewith N.Sch.4964 showing the front end of the side steering tube based on the Expl.Dept's suggestion. An adjustment of .250" has been provided for. Since we have been given to understand by the Production D.O. that tubes can be obtained with a limit to either the inside or the outside diameter (but not both) we have shown a tube having a .6875" internal diameter and .144" thick. We have also shown the tube turned down .875" diameter between the joints. If this process is very costly and the saving in cost does not merit the saving in weight, we are prepared to accept the tube unturned. We would be glad if the Cost Dept. would give us the following comparison of costs:- 1) N.Sch.4920 with butted tube. Adjustment at front end. 2) Lec.5349 with adjustment at the front end. 3) N.Sch.4964 with adjustment at front end. 4) Adjustment at front end on N.Sch.4964 but with the tube not turned down along its whole length between the joints. 5) Side steering tube as on N.Sch.4964 but with an adjustment at both ends having a left and right hand thread. 6) We would like the cost of the side steering tube itself unmachined in nickel steel, .35 Carbon and Mild steel. Now that our side and cross steering tubes on independently sprung cars are straight and comparatively | ||