Rolls-Royce Archives
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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).
Instruction sheet detailing the cause of a P&R battery cell failure after extensive road and bench testing.

Identifier  ExFiles\Box 54\1\  Scan327
Date  15th April 1929
  
ROLLS-ROYCE LTD.
INSTRUCTIONS.

To: E.T.C.
Order No. IC.156.
Customer's No. X4617S.

Re Failure of P&R cell from S1 Battery

This cell has covered 9012 miles on the road & has been on our bench life test 3 years.
Failure was due to the stretching of the positive plates which overlapped the negative plates & separators allowing paste to accumulate between & cause a short.
The wood & ebonite separators were good but the ebonite separators were short by 1/2 inch which would be serious if the plates buckled & punched through the wood, which in case there would be a premature failure. Luckily this is a fault now which we never have & seems to have been entirely eliminated.
The negative plates were very good.

Signed

This Sheet must be filed on completion of the work.
  
  


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