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 engineering modifications and parts for the Spectre 12-Cylinder engine.
| Identifier | ExFiles\Box 133\4\ scan0043 | |
| Date | 12th June 1935 | |
| - 12 - BY.12/G.12.6.35. SPECTRECodename for Phantom III 12-CYL. ENGINE. --- N. Sch. 4436 Water Excluders Front Brakes with Bentley Type Adjusters ................. Recd. 2.4.35. Detail drawings completed and issued ........ 15.4.35. N. Sch. 4437 Support Bracket for foot Brake Countershaft .. Recd. 8.4.35. Detail drawings completed and issued ........ 27.4.35. N. Sch. 4444 Modfns. to Lightening Holes in Cross ...... Recd. 8.4.35. Detail drawings completed and issued ........ 6.6.35. N. Sch. 4447 Modfns. to Singe Plate Clutch ............ Recd. 24.4.35. Detail drawings completed and issued ........ 29.5.35. N. Sch. 4448 Gearbox - Gears clamped endwise .......... Recd. 10.4.35. Detail drawings not required. N. Sch. 4449 Additional View - Support Brkt. for Steering Box. Recd. 10.4.35. Detail drawings completed and issued ........ 26.4.35. N. Sch. 4450 Oil Filler for Spring Pot of experimental progressively rated .................. Recd. 10.4.35. Detail drawings completed and issued ........ 9.5.35. N. Sch. 4451 Headlamp Support Tube and Wing Stay ......... Recd. 10.4.35. Detail drawings completed and issued ........ 18.4.35 N. Sch. 4460 Alternative Gearbox Front Suspension Rubbers. Recd. 17.4.35. Detail drawings completed and issued ........ 6.6.35. N. Sch. 4463 Alternative Gearbox Rear Support ........... Recd. 17.4.35. Detail drawings completed and issued ........ 15.5.35. N. Sch. 4468 Modfn. to Actuating Gear due to shortened Gear Change Lever .................. Recd. 25.4.35. Detail drawings completed and issued ........ 1.6.35. N. Sch. 4472 Modfns. to Clutch, Increasing Casing clearance and improving visibility of timing pointer ... Recd. 27.4.35. Detail drawings completed and issued ........ 29.5.35. N. Sch. 4475 Inspection Cover to see Actuating Mechanism.. Recd. 4.5.35. Detail drawings completed and issued ........ 30.5.35. | ||