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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).
Note about the design and lubrication of an AL Ram type slipper piston.

Identifier  WestWitteringFiles\D\December1919\  Scan24
Date  24th June 1930
  
40/50 AL RAM TYPE SLIPPER PISTON
ORIGINAL

CK.{Mr Clark}X 346. A.M. from S.
Cods. to GSC. 24. 6. 30.

CK.{Mr Clark}X 346. Slipper type Ram Piston.

Herewith we just send to you drawing sheets of the existing drawing and arrangement of existing and the above, Ref.No.68531. The complete series was not considered desirable, and we are as shown for the ram was not considered particular, just a piston with a ram is based on piston design as used on the engine having square faces the main difference being.
.168.1185.

In the usual manner, it should be noted that it is essential that the ends of the connecting rod, as this design produces what is best form of scraper ring with which we are acquainted. It should be remembered that all drawing should therefore be punched. The speed.

However the supply of oil to the small end is usually the abundance of oil. It is not so successful by internal theft of the oil. The gudgeon pin is in this design lubricated with oil passed down its bored-out centre - passed all down.
  
  


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