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 P.V. XII, P.V.G, and 'Merlin' B aero engines.
| Identifier | ExFiles\Box 30\3\ Scan115 | |
| Date | 16th March 1935 | |
| - 3 - BY.1/G.16.3.35. P.V. XII. AERO ENGINE. RR.Sch.777 Suggested modifications to Pressure Pump Inlet Branch to clear gusset on plane. Detail drawings completed and issued ........ 1.2.35. RR.Sch.804 Diagram of Supercharger drive (10.13:1 Ratio). Detail drawings completed and issued ........ 10.1.35. RR.Sch.806 Ramp Head. Tpp Water Outlet Pipes (Front Outlet Type). Detail drawings completed and issued ........ 1.2.35. RR.Sch.810 Ramp Head. Modified Oil Drain from Cylinder Head. Detail drawings completed and issued ........ 1.2.35. RR.Sch.818 Ramp Head. Modified Water Passage - Cyl. Hd.{Mr Hayward/Mr Huddy} 'B' Unit only ........ Detail drawings completed and issued ......... 22.1.35. DES.2344 Bellows for Cylinder Liner ............ Recd.16.1.35. Detail drawings completed and issued ......... 23.1.35. LeC.4277 Camshaft Driving Spindle Retaining Washer ..... Recd. 1.1.35. Detail drawings not required. LeC.4307 Manifold & Port Areas ................ Recd.15.1.35. Detail drawings not required. LeC.4315 Ramp Head S/C. Modified Exhaust Port & Coolant Outlet ........................ Recd.23.1.35. Detail drawings completed and issued ......... 12.3.35. P.V.G. AERO ENGINE. LeC.4279 S.C.Unit. Retaining Washer for Camshaft Drive Coupling ......................... Recd. 1.1.35. Detail drawings not required. DES.2369 Lower Half Crankcase with detachable oil baffle. Recd.20.2.35. Detail drawings not required. "MERLIN" B. AERO ENGINE. RR.Sch.823 Piston - 6.5 to 1 Compression ratio. Detail drawings completed and issued ......... 18.2.35. | ||