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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).
Comparative weight analysis of Duralumin and Steel Rocker Pedestals for the Phantom Rocker Mechanism.

Identifier  ExFiles\Box 14\1\  Scan001
Date  22th June 1926
  
X7000

To Hs{Lord Ernest Hives - Chair} from RHC.{R. H. Coverley - Production Engineer}

RHC{R. H. Coverley - Production Engineer}4/BE. 22.6.26.

RE PHANTOM ROCKER MECHANISM. 12. EX.

We give below comparitive weights of Duralumin and Steel Rocker Pedestals used on the above:-

Standard Steel Pedestals

1 set(4) - E.70215 - .812 lbs.
1 " (") - E.70217 - 1.390 "
1 " (") - E.71344 - 1.405 " ...........3.607 lbs.

Duralumin Pedestals

1 set(4) - E.74650 - .296 lbs.
1 " (") - E.74651 - .515 "
1 " (4) - E.74652 - .523 " ...........1.334 lbs.

Diff: in weight - 2.273 lbs.

Standard Rocker Shaft(Steel Pedestals )
Front & Rear Halves assembled complete ) 12.031 lbs.

Rocker Shaft(Duralumin Pedestals)
Front & Rear Halves assembled complete ) 9.750 lbs.

Total saving on assembled units - 2.281 lbs.

RHC.{R. H. Coverley - Production Engineer}

Hce
  
  


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