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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 preparation of water pump tests and their components.

Identifier  ExFiles\Box 81\2\  scan0015
Date  5th October 1917
  
R.R. 235 A (770 H) (S.D. 442, 9-5-17) G 1965.

X.3152
5.10.17.

To Mr. Clark.

WATER PUMP TESTS X.3149 X.3152A/B.

With reference to the above we have now
X.3149 completed your Venturi meters, we have also prepared the
C.3125 Curved & Radial Vaned Rotors for test. I would like to
point out that water pump which we have prepared for
you is one which has been made up to drg. E.14232 for
X.3036B and fitted with a standard rotor at your
request, also casings have been black enamelled on the
X.3152 inside as instructed on sheet BY/JH6/DB{Donald Bastow - Suspensions}26717 X.31252M.
as regards the black enamel job we have had a water pump
fitted to Falcon A engine for the past 12 months which
was prepared with black enamel outside and inside.

(Sgd) R.H. Coverley.
  
  


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