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).
Alternative battery options and recommendations for the Peregrine model.
| Identifier | ExFiles\Box 58\4\ Scan077 | |
| Date | 9th September 1932 | |
| Ry. from Hs{Lord Ernest Hives - Chair}/Wst. c. E.{Mr Elliott - Chief Engineer} c. Roy.{Sir Henry Royce} X6148 Hs{Lord Ernest Hives - Chair}/Wst.2/AD2.9.32. PEREGRINE BATTERIES It has been generally agreed that the existing Peregrine battery is too small when based on the 20 ampere hour rate of discharge. It also is not up to R.R. standard in that it has 3/32" plates and plain wood separators. The battery now proposed for this chassis is the National 6-CLD.11A and the Exide 6.XCM11-1M. These batteries, however, although of higher ampere hour capacity do not possess the long life features of the existing R.R. batteries. The National Accumulator Co. can supply us with a good compromise in the shape of a battery having 1/8" thick plates with wood and ebonite separators having a capacity of 55 ampere hours instead of the proposed 63 and compared with the existing battery capacity of 52 ampere-hours. The type of this battery is 6.BPHL-9. In order to have all the R.R. features, we should have to go to a 7-plate battery having only 47 ampere hours capacity unless we had a 2 1/2" longer battery which is undesirable. We have therefore the following alternatives :- Type 6.CL-11A - ordinary cheap 3/32" plates wood separators. Type 6.CLD-11A - ordinary cheap 3/32" plates wood and ebonite separators. Type 6.CLR-7A - long life 5/32" plates wood and ebonite separators. Type 6.BPHL-9 - medium 1/8" plates wood and ebonite separators. These are all National types of which Exide have duplicates. We recommend therefore, that we obtain three batteries from each maker as follows :- | ||