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).
Design position report detailing modifications and development status for Merlin and Kestrel engines.
| Identifier | ExFiles\Box 161a\4\ scan0159 | |
| Date | 24th October 1936 | |
| ITEM. (14) DESIGN POSITION. MERLIN "G" (CONTINUED) Mod. to starter bevel nut - change of material. Completed 12.10.36. Mod. to oil filter nut. " " 12.10.36. MERLIN "H" ENGINE. Exhaust valve and seat. - flexible type - large dia. .500" dia. stem and Venturi.type strengthened seat. Put aside. Reduced area water ports in side water pipes. " " KESTREL LVI. ENGINE. Wheelcase and drives. In hand. Supercharger and drive. In hand. Reduction gear and camshaft drives. Cancelled. Preliminary installation drawing. In hand. MERLIN "F" DEVELOPMENT. Shrouded rotor with steel rotating guide vanes - 2-speed supercharger. Completed. Rear gear casing with radii added - 2 speed supercharger. Completed 22.10.36. Increased operating valve passages - temporary scheme - 2 speed supercharger. Completed 24.10.36. Increased operating valve passages - permanent scheme - 2 speed supercharger. Completed. Modified rear gear housing - two speed supercharger. In hand. | ||