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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. "
  
  


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