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).
Misunderstanding of the flame hardening process for an M.40 engine, requesting chill hardened shafts as an alternative.
| Identifier | ExFiles\Box 109\3\ scan0177 | |
| Date | 29th May 1941 | |
| To TB/KNG. from Rm{William Robotham - Chief Engineer}/HH. c. to Rm.{William Robotham - Chief Engineer} c. to HPS.{Horace Percy Smith - Experimental Factory Mgr} c. to Ru/CTS.{C. Trot Salt - Carburation} c. to EV.{Ivan Evernden - coachwork} c. to EV{Ivan Evernden - coachwork}/JD.{J. Draper - Frames} Loxford [handwritten, struck through] 700 [handwritten] Rm{William Robotham - Chief Engineer}/HH.3/SW.29.5.41. M.40 Engine. Cam & Rocker Mech - Sec.5090. Further to our memo reference Rm{William Robotham - Chief Engineer}/HH.3/SW.22.5.41., and in answer to TB/KNG.1/JT.26.5.41., we would point out that we erroneously read TB/KNG's observations on the flame hardening process as an indication that this method was adaptable to our existing equipment. We are disappointed that we cannot try a pair of shafts with the cam tips hardened by the flame process, and would therefore request TB/KNG. to produce four shafts as chill hardened in "Nichromol" i.e., 2 off - RE.2440 and 2 off - RE.2441. We attach prints of these drawings to TB/KNG's copy of this memo. In view of the further information received will all concerned kindly note that alteration to LOP.RE.1682 No.316/RE. will now add only RE.2440/1 (Nichromol chill hardened shafts) as alternatives with RE.2422/3 (Shafts in S/ZN, case hardened in the usual manner). This alteration was referred to in our memo Rm{William Robotham - Chief Engineer}/HH.3/SW.22.5.41. Kindly instruct up as required. Rm{William Robotham - Chief Engineer}/HH. | ||