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).
List of modifications and drawing status updates for the Spectre 12-cylinder engine.
| Identifier | ExFiles\Box 30\3\ Scan126 | |
| Date | 16th March 1935 | |
| - 14 - BY.1/G.16.3.35. SPECTRECodename for Phantom III 12-CYL. ENGINE. -------------------- RR.Sch.820 Engine Lamp. Detail drawings are in hand. RR.Sch.824 Layout Lubricator Pipe to Servo (to suit raised gearbox crossmembers). Detail drawings completed and issued ........ 15.2.35. LeC.4278 Water Drain on Air Duct ................. Recd. 13.2.35. Detail drawings completed and issued ........ 19.2.35. LeC.4284 Longer Piston & Cylinder Liner ............ Recd. 12.1.35. Detail drawings completed and issued ........ 4.2.35. LeC.4294 Scuttle Isolation - 31-EX. onwards....... Recd. 7.2.35. Detail drawings completed and issued ........ 9.2.35. LeC.4346 Additional Body Bracket................. Recd. 13.2.35. Detail drawings will be put in hand if required. LeC.4352 Modified Oil Sump with extra Oil Baffles .....Recd. 18.2.35. Detail drawings completed and issued ........ 4.3.35. LeC.4353 Roller Tappets. Recd. 12.2.35. Superseded by LeC.4383. LeC.4358 31.EX.only. Additional Body Brkt. by 3rd Xmbr.Recd. 13.2.35. Detail drawings will be put in hand if required. LeC.4362 Transverse Stay to Back of Body .......... Recd. 14.2.35. Detail drawings completed and issued ........ 27.2.35. LeC.4364 Expl. Body Bracket at Rear Dumb Iron ....... Recd. 20.2.35. Detail drawings will be put in hand if required. LeC.4365 Scuttle Fixing to Frame ................ Recd. 20.2.35. Detail drawings will be put in hand if required. N.Sch.4337 Stiffener for Front End of Frame .......... Recd. 15.1.35. Detail drawings completed and issued ........ 18.2.35. N.Sch.4344 Sleeve for 3rd. Motion Shaft with Thickened Flange .......... Recd. 18.1.35. Detail drawings completed and issued ........ 7.2.35. | ||