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).
Installation and comparison of various battery types for Goshawk chassis.
| Identifier | WestWitteringFiles\H\March1922\ Scan29 | |
| Date | 8th February 1922 | |
| To R & H.{Arthur M. Hanbury - Head Complaints} -4- EFC/T8.2.22 (Contd). so far. We have now half a dozen of these batteries in all, two of which are installed on Goshawk chassis. We have received two of the P & R H.D.W.7 and four of the P & R H.D.E.9, the dimensions of these being slightly greater than those of the C.A.V.Willard, which has been reported. The P & R Company are not atall happy about the use of batteries of such small size. The Exide 6-XHR-3, of which we have only received one sample, is a similar size to the C.A.V.Willard and exactly a half size edition of the 6-XHR-6 for the 40/50, i.e. contains all these modifications which our mutual experience with the Chloride Company has shown desirable. Of the two P & R types, the H.D.E.9 has 9 plates of thinner section than the 7 plates of the H.D.W.7, and has a rather lower resistance. The P & R Company are anxious that we should have a battery of the plate thickness of the H.D.W.7, but of capacity and internal resistance, similar to the H.D.E.9, i.e. they are not satisfied with either type but have given us the two types from which to make our own choice if we retain the dimensions already arranged. EFC. | ||