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 listing modifications and status for Merlin 'G' and 'H' engines.
| Identifier | ExFiles\Box 161a\4\ scan0135 | |
| Date | 22th September 1936 | |
| ITEM. (9) DESIGN POSITION. MERLIN "G" ENGINE - CONTINUED. Gun turret pump and drive. Completed 22.9.36. Inlet and exhaust valve lift curve - comparisons. " 18.9.36. Mod. to crankcase breather to clear cylinder blocks. " 11.9.36. Mod. to camshaft auxiliary drives - holes added to bevel wheel. " 15.9.36. " " " " " - diam. of sleeve increased. " 10.9.36. " " auxiliary drives - method of locking rocker shaft nut. " 16.9.36. Mod. to sparking plug holes and adaptors. Completed. V.P.airscrew oil pipe - relief valve to crankcase - to suit Hele Shaw crankcase. Completed 22.9.36. Modified water rails and inlet conduits. In hand. Modified exhaust conduit. In hand. Modified bearing bracket bolt, rear camshaft bearing. In hand. Keyed washer for locking tab, lower camshaft drive. Completed 22.9.36. MERLIN "H" ENGINE. Exhaust valve and seat - flexible type - large diameter .500" dia. stem and venturi type strengthened seat. In hand. Reduced area water ports in side water pipes. In hand. | ||