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).
Comparison of specifications between a proposed and an existing battery for a 40/50 HP car.
| Identifier | ExFiles\Box 58\4\ Scan016 | |
| Date | 20th January 1932 | |
| DEPARTMENT CORRESPONDENCE. To Mr. Dean. Customer's Name ROLLS-ROYCE. 40/50 h.p. Car. HEAD OFFICE. x6136 Ref. DW/GF. Exide Date 20.1.32. Proposed battery:- Ebonite container, without cover, battery type 2/3-XRR11-1H. Per cell:- 5 Positive plates 5 11/16"W. 4 7/8"L. 5/32"T. (plate body) 4 Negative " 5 11/16"W. 4 7/8"L. 1/8"T. ( " " ) Inter 2 " " 5 11/16"W. 4 7/8"L. 3/32"T. ( " " ) End. Inter.plate pitch 35/64". End plate pitch 17/32". Double separation. Deposit space 15/16". Weight per 6-volt unit, charged, 50 lbs. (actual) Capacity 87 A.H./20 hours. Overall dimensions of 6-volt unit 6 11/16" x 10 3/8"L. x 9 5/16"H.{Arthur M. Hanbury - Head Complaints} Existing battery:- Ebonite container, with cover, battery type 2/3-RR5-1L. Per cell:- 5 Positive plates 4 15/16"W. 5 1/8"L. 5/32"T. (plate body) 4 Negative " 4 15/16"W. 5 1/8"L. 1/8"T. ( " " ) Inter 2 " " 4 15/16"W. 5 1/8"L. 3/32"T. ( " " ) End. Inter.plate pitch 35/64". End plate pitch 17/32". Double separation. Deposit space 1 1/4" (was 7/8" in RR5 wood tray battery) Weight per 6-volt unit, charged, 60 lbs. (actual) Capacity 87 A.H./20 hours. Overall dimensions of 6-volt unit 5 7/8" x 10 5/8"L. x 10 7/8"H.{Arthur M. Hanbury - Head Complaints} Handwritten notes: Taper leg as against screw Screws WST Copy for File Form No. 719 500. Pads 3-31. | ||