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).
Letter from Peto & Radford discussing various battery options and specifications for the 40/50 car model.
Identifier | ExFiles\Box 38\5\ Scan207 | |
Date | 23th March 1922 | |
x3398 COPY OF LETTER RECEIVED FROM:- PETO & RADFORD, 50, GROSVENOR GARDENS, LONDON, S.W.1. M/C.232. x4414P x3398 23rd March, 1922. Messrs. Rolls Royce Ltd., Nightingale Road, Derby. Dear Sirs, For the attention of Mr. Fowler Clark. We thank you for yours of the 22nd. inst. EFC3/T. which in a sense crosses ours of yesterday. To answer the points raised in your letter. Batteries for 40/50 Car. We will take this as being the B.D.11 type. We can of course make this up in the taller type, H.B.D.11 which would increase the height of the overall battery by 3/4" but it would give you 15% increase in capacity if you wish it. We should like to know whether you would like to discuss this as a battery for the 40/50 car or keep to the B.D.11 already submitted and tried. There is very little in it in price and weight or dimensions, but on the other hand you may consider the B.D.11 as submitted is amply big enough. We are in entire agreement with the remarks in the rest of your letter with the exception of one. You say that we are agreed that the B.D.7 is better than the H.D.E.9. We cannot quite say yet whether this is our opinion without going into the matter very closely at our Works. Although the B.D.7 has the thicker plates and more acid room there is more strain on it as three positive plates are doing the work instead of 4 in the H.D.E.9. Whether the one feature will outweigh the other we cannot say at the moment, but we will let you know. We were not proposing to go into this matter deeply with our Works until we had your decision about the possibility of using the B.D.9 when the matter would not arise. We will certainly take back the 2 H.D.E.9 batteries if you wish to return them and submit in their place the taller type, but again we take it that this had better wait | ||