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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).
Modification bulletin for Kestrel V.XII aero engine exhaust manifolds to allow for expansion and contraction.

Identifier  ExFiles\Box 10\5\  05-page056
Date  28th January 1937
  
MODIFICATION TECHNICAL BULLETIN

AERODROME, Hucknall.
REF: AERO/G/JSR DATE: 28.1.37

SUBJECT.
"Kestrel" V.XII Aero Engines.
Exhaust Manifolds.

OBJECT.
To provide means to allow for
expansion and contraction.

MODIFICATION.
To fit slotted type securing flanges to the
inlet and outlet ends of the exhaust manifolds
and fit special shouldered studs
to suit.

REPLACEMENT EFFECTED.
Immediately on all production engines
and on repair engines when manifolds
are renewed.

AFFECTING.
Kestrel V.XII engines from No. K.V.XII.
101 onwards. All earlier engines
modified as opportunity arises.

INTERCHANGEABILITY.
Manifolds as modified are interchangeable
with the earlier type, providing the special
studs are also fitted.

DRAWING NOS.
Manifolds R.H. 38576/12
" L.H. 38577/12
Stud R.M. 2383

WEIGHT.
Increase negligible.
  
  


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