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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).
The construction of an exhaust silencer snout and cut-out flange, including Mr. Royce's design suggestions.

Identifier  ExFiles\Box 33\2\  Scan037
Date  1st September 1920
  
To Hs{Lord Ernest Hives - Chair}, Da{Bernard Day - Chassis Design}, and Ry. -3- E1/918.S.20. Contd.
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The assembled silencer snout should be secured
to the exhaust pipe by welding in the usual manner round the
end, and should be additionally secured top and bottom by weld-
ing, through holes in the cylindrical portion of the snout on
to the exhaust pipe inside.


The thickness of the sheet metal pressings should
be about .080".
Mr. Royce remarked that he would rather use
brazing metal for both the silencer snout and the cut-out flange
at once in preference to steel castings, as the brazing metal
castings could be made to a reasonable thickness.

EXHAUST CUT-OUT FLANGE AND EXHAUST PIPE BETWEEN SILENCERS (40/50 H.P.)
---------------------------------------------------------------------

X.3348. X.4072. The possibilities of sheet metal construction
for this piece was gone into to some extent by Mr. Royce, and
several designs were sketched, one of which is shewn below.



Mr. Royce also suggested cutting the pipe, and
bending up two flaps of the pipe material itself, and then weld-
ing in end pieces to form a rectangular tube on the pipe which
would carry a pressed steel flange. It was decided, however,
in the end that the simplest policy to follow would be to adopt
a drop forged flange of the present design, but without the
saddle piece on the forging lightened out wherever possible,
and welded round the lower edge to the exhaust pipe. This
piece is illustrated as follows:-



Contd.
  
  


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