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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).
Instructions regarding the testing and comparison of P&R Batteries, type BD-11, and the ampere-hours realised.

Identifier  ExFiles\Box 38\5\  Scan289
Date  6th December 1922
  
RR 238 (300 Bks.) (SF 152. 6-11-18.) MP 197880
ROLLS-ROYCE LIMITED.
INSTRUCTIONS.
X. 3398
Dec. 6th 1922
To E.F.C
Order No. PB.67
Customer's No. X 3398

P&R Batteries
Type BD{Mr Berend}-11

Attached is a low rate discharge curve taken on the P&R battery BD{Mr Berend}11/2 to compare with those obtained with the BD{Mr Berend}11/1 when passing through its routine tests.

The record sheet of BD{Mr Berend}11/1 is also attached for filing as this battery has been returned to the makers for examination and report.

Ampere hours realised = 57.
" " previously obtained during routine tests on BD{Mr Berend}11-1
= 51.

Signed C.H.P.
This Sheet must be filed on completion of the work.
  
  


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