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).
Cost reduction proposals for the Goshawk II Gearbox control levers.
| Identifier | ExFiles\Box 75\1\ scan0221 | |
| Date | 19th April 1921 | |
| R.R. 199 (250T) (SD676 19-7-17) MP180865 X4247 BY15-P19.4.21. from BY.{R.W. Bailey - Chief Engineer} C. Hs.{Lord Ernest Hives - Chair} X4247 GOSHAWK II. GEARBOX. Referring to proposals to reduce cost on the above, I think the following point deserves careful consideration:- On LeC.1333, the Control Levers for the Sliding Gears are specified as being pinned and brazed. We assume that they are intended to be case hardened like our present type. Of course, if it were intended for them to be in special material, say Hall's metal for preference, the parts as shown are satisfactory, but assuming that they were intended to be case hardened the pinning and brazing seems to me to be an oversight. We agree, of course, that it can be done, but it is a kind of artist job for each lever, as the lever would have to be carburised, brazed on to the tube and then the brazing immersed in water, whilst the jaw was heated up to such a temperature as to permit of hardening, or the reverse order of events could be worked upon. We would like to put forward the following points:- (a) Preferably we would like to produce the levers in Hall's alloy. (b) If case hardening material is actually required, then we would suggest the better scheme would be to pin and sweat the levers to the tubes. Please let me have a reply as early as possible. BY.{R.W. Bailey - Chief Engineer} | ||