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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).
Strengthening modifications to the New Phantom induction pipe and Autovac union fitting.

Identifier  ExFiles\Box 66a\2\  scan0122
Date  22th March 1926
  
EP.{G. Eric Platford - Chief Quality Engineer}
c. to Hs.{Lord Ernest Hives - Chair}
c. to Mx.{John H Maddocks - Chief Proving Officer}
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X8070    BY/C17/G.22.3.26.

re NEW PHANTOMCodename for PHANTOM I INDUCTION PIPE & AUTOVAC UNION.
------------------------------------------

With reference to EP{G. Eric Platford - Chief Quality Engineer}1/H18.3.26. we have recently
strengthened the fitting on to which the cap nut is screwed
by reducing the size of the hole through the centre, also
we have staggered the four small holes which are drilled
through from the outside.

If fibre washers are used as intended, it is
impossible for the cap nut to screw down on to the fitting,
and we consider that there is sufficient clearance to allow
for a slight compression of these washers.

We consider that the above alterations will
materially strengthen the pieces, when we think that you
will experience no further trouble.


BY/C.
  
  


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