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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).
Specification of brushes for the Goshawk II dynamo and motor.

Identifier  ExFiles\Box 35\4\  scan 045
Date  30th August 1921
  
X.4384

EFC. from EY. BY3/P30.8.21.

X.3945. GOSHAWK II. DYNAMO & MOTOR X.4383.
X.3348. LeC.1428 & 1436. X.4384.

In E1/G29821 replying to certain queries which
I raised in connection with the above Lec's, Mr. Elliott
makes the following remark :-

"There is a point with regard to the brushes which
might be mentioned here. Morganite has been
specified on the drawings for both the dynamo and
the motor, but Mr. Royce would like you to try in
addition, a similar grade of Le Carbone for the
dynamo, as the high quality of this product might
give a very small coefficient of friction;"

We would naturally order the same quality
Morganite brushes for motor and dynamo respectively, as
are being used on the 40/50 motor and dynamo, but since
Mr. Royce appears to intend to experiment again on these
points, we would like you to specify a particular type or
quality of Morganite and also the Carbone which you consider
most suitable.

EY.

Motor. Dynamo.
Morganite C.M.3 only. C.C.3 Le Carbone. Yes.
E.G. " " No.
X " " Yes.
Z " " No.
C.M.9 Morganite. No.
E.G.O. Morganite. Yes.

_______
EFC.
  
  


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