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 parts for the Spectre 12-Cylinder Engine.
| Identifier | ExFiles\Box 30\3\ Scan006 | |
| Date | 10th November 1934 | |
| - 6 - SY.1/G.10.11.34. SPECTRECodename for Phantom III 12-CYL. ENGINE. ------------------------ N.Sch.4214 Sheet Steel Brake Shoes (Front) ............ Recd. 4.10.34. Detail drawings are in hand. RR.Sch.742 Distributor with Bentley Type Contact Fingers. Detail drawings completedand issued ...... 29.10.34. LeC.4139 Axle Rebound Rubber Buffers ............ Recd. 16.10.34. Detail drawings completed and issued ...... 24.10.34. N.Sch.4218 Sheet Steel Brake Shoes (Rear - Foot) ..... Recd. 13.10.34. Detail drawings are in hand. N.Sch.4224 Looking Ball for 1st. Speed Gear ............ Recd. 13.10.34. Detail drawings are in hand. N.Sch.4228 Engine & Gearbox Couplings ............ Recd. 24.10.34. Detail drawings are in hand. N.Sch.4230 Shock Damper modified to give unit construction. I.F.W.S. ............ Recd. 18.10.34. Detail drawings are in hand. N.Sch.4231 Unit Construction Shock Damper adapted to simple lever system. I.F.W.S........... Recd. 19.10.34. Detail drawings are in hand. N.Sch.4232 Modfn. to accommodate grinding wheel when sleeve is deleted ............ Recd. 19.10.34. Detail drawings completed and issued ..... 31.10.34. N.Sch.4233 Modfn. to fitting bolts in Gearbox casing. Recd. 24.10.34. Detail drawings are in hand. N.Sch.4234 Mod. to Selector lock Housing & Casing.... Recd. 24.10.34. Detail drawings are in hand. LeC.4147 3rd. Crossmember with improved ground clearance and silencer support ............ Recd. 30.10.34. Detail drawings completed and issued ..... 6.11.34. LeC.4160 Raised Silencer Front End ............ Recd. 3.11.34. Detail drawings are in hand. LeC.4162 Modfn. to Larger Water Pump ............ Recd. 31.10.34. Detail drawings will be put in hand as soon as possible. Le C.4177 Distributor Head & Rotor ............ Recd. 5.11.34. Detail drawings are in hand. LeC.4184 Experimental Exhaust Manifolds ............ Recd. 5.11.34. Detail drawings not required. | ||