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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).
Specifying the dimensions for the matrix tubes of a Phantom radiator.

Identifier  WestWitteringFiles\Q\January1927-March1927\  148
Date  31th March 1927
  
TO DA{Bernard Day - Chassis Design} FROM R.{Sir Henry Royce}
(At Le CanadelHenry Royce's French residence.)

C. to - DJ. HS.{Lord Ernest Hives - Chair}
BY F

PHANTOM RADIATOR. X8250

Regarding N. sch. 2371. we choose the shorter and smaller matrix tubes - 7/6.25 mm., 4.25 long - made up with the standard construction as shewn in Fig. 1.

The space between the bonnet ledges and the ends of the outside rows of tubes should be not less than .100.

R.{Sir Henry Royce}

[STAMPED TEXT]
ORIGINAL
R3/M31.3.27.
REC'D & DESPATCHED FROM WW. 4.4.27.
  
  


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