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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).
Comparing engine oil way dimensions for various engine models.

Identifier  ExFiles\Box 141\2\  scan0247
Date  18th April 1941
  
lubrication
1184
To Rm.{William Robotham - Chief Engineer} from Jnr.{Charles L. Jenner}
Jnr.{Charles L. Jenner}6/SW.18.4.41.

Engine Oil Ways.

Even if we might be inclined to agree with Mr. Johnson of Vandervells in regard to small oil passages on our old engines, all engines designed by me have been generous in this respect as can be seen by reviewing.

Merlin - 27 litres.
Gallery Dia. .437
Bearing Feed Holes .275

B.V. & Wraith - 4.25 litres.
Gallery Dia. .350
Bearing Feed Holes .287

B.60 - 4.25 litres.
Gallery Dia. .650
Bearing Feed Holes .250

Myth - 1.5 litres.
Gallery Dia. .383
Bearing Feed Holes .218

We could also compare on bearing sizes and periphery leaks but the results would still show a similar result.

J60 2litres

Jnr.{Charles L. Jenner}
.500 Gallery
.3125 / .250
E/B.
  
  


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