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).
Manufacturing queries and issues with the first sample of a 40 m/m Naval Gun mounting.
| Identifier | ExFiles\Box 175\3\ img169 | |
| Date | 18th September 1940 | |
| 3 To Rm.{William Robotham - Chief Engineer} from Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation} c.c. Ev.{Ivan Evernden - coachwork} c.c. Rm{William Robotham - Chief Engineer}/LH.{Mr Haworth} c.c. HPS{Horace Percy Smith - Experimental Factory Mgr}/LB. Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation}1/SW.18.9.40. 40 m/m Naval Gun Type BD.{Mr Berend} Mountings (LMS) Production of first sample pedestal type to QPL.124 and QPL.127. Now that the first sample of the above has been completed and delivered, it is as well to record the details and queries concerned with its manufacture. There have been no queries connected with the outer cone, other than the opinion expressed that it could be produced with one seam. The inner (inverted) cone, which is the working piece in the mounting, is called for as a casting on the scheme drawing. The first one produced was scrap due to blow-holes, the second one was O.K. but the LMS have expressed the opinion that it should be a forging. Re. ball races, it now appears that the LMS have been chasing Hoffmann, at the same time as we have. We have accordingly acquainted them with the correspondence etc., so far entailed on our part, and are leaving it to them to continue the chasing. They have been unable to obtain the lubricators called for, to oil these bearings, and on this first mounting to go out, they have filled the holes with grease, then fitted screw-in plugs. In their experience, they state that for the work these bearings have to do this procedure would suffice. They are making further suggestions, to incorporate grease gun connections. The LMS have also been issued with QPL.130, the Ammunition tray, which they have produced and fitted to this first mounting. It has been found that the ammunition tray fouls the parking stop (lateral), and to get over this, it was suggested that the parking stop should be inverted. Finally, they have been issued with the Armour plate to QPL.136, which they will detail, and fit to the next mounting. (continued) | ||