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\ Scan062 | |
| Date | 19th January 1935 | |
| SPECTRECodename for Phantom III 12-CYL. ENGINE. - 11 - BY.1/G.19.1.35. LeC.4192 Modified Starting Handle........... Recd. 16.11.34. Detail drawings completed and issued ........ 22.12.34. LeC.4196 Modn. to Connecting Rod ........... Recd. 15.11.34. Detail drawings completed and issued ........ 30.11.34. LeC.4206 Mounting of Lucas Horn ............. Recd. 17.11.34. Detail drawings completed and issued ........ 22.12.34. LeC.4207 Layout of Enclosed Drive Limousine .... Recd. 22.11.34. Detail drawings not required. LeC.4208 Raised Petrol Tank & Exhaust Swan Neck ... Recd. 20.11.34. Detail drawings completed and issued ........ 17.12.34. LeC.4217 Modfn. to Tappets ................... Recd. 23.11.34. Detail drawings completed and issued ........ 7.12.34. LeC.4225 Front Suspension Box & Bottom Water Pipe .... Recd. 13.12.34. Detail drawings completed and issued ........ 20.12.34. LeC.4236 Modified Rear End of Rebound Girder .... Recd. 12.12.34. Detail drawings completed and issued ........ 22.12.34. LeC.4272 Revised Steering Positions .......... Recd. 4.1.35. Detail drawings not required. LeC.4273 Mixture Control to suit new instrument board. Recd. 2.1.35. Detail drawings will be put in hand as soon as possible. LeC.4285 .250" Longer Piston Skirt .......... Recd. 4.1.35. Detail drawings will be put in hand as soon as possible. LeC.4242 Modified Position of Headlamps ........ Recd. 12.12.34. Detail drawings completed and issued ........ 19.12.34. LeC.4245 C'shaft Flange ...................... Recd. 12.12.34. Detail drawings completed and issued ........ 5.1.35. LeC.4246 Camshaft Wheel & Front End ........... Recd. 12.12.34. Detail drawings will be put in hand as soon as possible. LeC.4250 Steel Push Rod ...................... Recd. 14.12.34. Detail drawings will be put in hand as soon as possible. | ||