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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).
Review and comparison of various battery types, including Lucas, C.A.V., and P.A.R.

Identifier  WestWitteringFiles\C\May1919\  Scan41
Date  2nd May 1919
  
R.R. 235A (500 T) (S.D. 408. 26-4-17.) Bm. 2/156/13.
-6-
EFC1/T2.5.19.
Contd.

You will notice that we have specified that the internal resistance should not exceed .025 ohm when carrying 100 amperes.
This would admit all the batteries except that of the Tudor make.
As previously stated, however, we have written to the Tudor
Company to ask them if they can remedy this defect.
Regarding the various batteries we would like to add
one or two remarks as follows:-
Lucas 60 ampere hour celluloid.
Electrically, this would appear to be a very good
battery as the discharge results and resistance results are
very good. The arrangement of cells in the battery is, however,
not what we require, but had the cells been arranged in this
manner the battery would appear to have a very good claim for
consideration. The construction of the celluloid cases is
very sound although, of course, the cells are not built up as
separate cells. It would be interesting to know if the Lucas
Company themselves make this battery.
C.A.V. 60 ampere hour celluloid.
Electrically, this battery is very nearly as good as
the Lucas, but of course, it is a mono-bloc battery and the
arrangement of the cells is not what we require.
P.A R.{Sir Henry Royce} 60 ampere hour celluloid and 45 amp. hour ebonite.
These batteries are quite fair as regards internal
resistance, but they have not shown up well in discharge
capacity. The construction of the batteries appears quite good
and the arrangement of cells is such as we require.
Contd.
  
  


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