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).
Issues and proposed modifications for a tank engine's starting handle shaft and a sticking air valve.
| Identifier | ExFiles\Box 25\1\ Scan046 | |
| Date | 28th March 1935 | |
| - Sheet 4 - E.8/HP.28.3.35. definitely tightened on its stud against the valve rocker pedestal retaining nut. A drawing will be prepared of this modification and submitted to the War Office. Starting Handle Shaft. The starting handle used on these tanks is much longer and more powerful than we normally supply for car work, and as the War Office wish to use this as a means of winding on the tracks some modification to the starter shaft will be necessary. We are preparing a modification to the design showing our recommendations. We are a little disturbed at this practice of winding on the tracks through the engine as it has the effect of putting the full torque through the stops on the timing gear spring drive, and we are not aware how much load is put on for this particularly purpose, but presumably this is general practice on this type of tank where other makes of engines are fitted and they naturally expect the same facilities with our engine. Air Valve Sticking. A further point not mentioned in Mx{John H Maddocks - Chief Proving Officer}/Skn.1/T. 27.2.35 is the continued tendency for the carburetter air valve to stick and the presence of water in the valve chamber giving rise to corrosion. This again is due to the condensation referred to in a previous item and we have no effective cure for this at the moment. E.{Mr Elliott - Chief Engineer} | ||