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 design status updates for Merlin 'G' and 'H' engines.
| Identifier | ExFiles\Box 161a\4\ scan0123 | |
| Date | 5th September 1936 | |
| ITEM. (11) DESIGN POSITION. MERLIN "G" ENGINE - CONTINUED. Restriction washer in water outlet rails. Completed 3.9.36. Mod. to roller bearing - upper vertical drive. " 5.9.36. Mod. to cylinder head - to clear breather. In hand " to rocker cover cyl. head - to clear cowling rail. In hand. " to induction pipe - to give more clearance for set screws. In hand. Gun turret pump and drive. In hand. MERLIN "H" ENGINE. Mod. to top water rails. Completed 22.8.36. Modified stand pipe - starter gear. " 20.8.36. Mod. to V.P. airscrew constant speed unit. " 22.8.36. " " adaptor on cyl. head - Hamilton constant speed unit. " 3.9.36. Exhaust valves & seats - various diams. and Stellite faced over tulip head 30° flexible seat. Completed. " " & " - stellite faced 1.475-45° seat stiff type. Completed. " " & " - stellite faced 1.475" dia. 45° seat flexible type. " " " & " - 1.475" dia. 30° seat. flexible type thickness .130. " | ||