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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).
Weight comparison between Des.1613 and Standard cylinder blocks.

Identifier  ExFiles\Box 179b\2\  img169
Date  24th November 1932
  
COMPARATIVE WEIGHTS OF DES.1613 AND STD.
CYLINDER BLOCKS.

Gos.1 Cylinder block com lete with Sodium Exhaust Valves and Fittings.
A.Side. 115 lbs. 4½ ozs.
B.Side. 115 lbs. 14 ozs.

Gos 1 Top water Pipes and Joint Washers 10 lbs. 0 ozs.
Gos.1 Induction Pipe 3 lbs. 12 ozs.
Total weight of one pair completed cyls. 244 lbs. 14½ ozs.


Standard Cylinder Block Complete with Standard Valves and Fittings.
A.Side. 107 lbs. 14 ozs.
B.Side. 108 lbs. 11 ozs.

Standard Top Water Pipes and Connections. 9 lbs. 1 oz.
Standard Ind. Manifolds with Joint Washers, Nuts, and Induction pipe. 22 lbs. 10 ozs.
Total Weight of One Pair Complete Cyls. 248 lbs. 4 ozs.


Gos.1 Cylinders are lighter by 3 lbs. 5½ ozs.
  
  


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