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).
Table of dimensions for dynamo brushes for Goshawk and E.A.C. models.
| Identifier | ExFiles\Box 60\1\ Scan005 | |
| Date | 11th May 1926 | |
| 11.5.26. DYNAMO BRUSH DIMENSIONS. MAIN. | CONTROL. --- Row 1: Goshawk. MAIN: .300, .750, .225 sq." CONTROL: .200, .750, .150 sq." --- Row 2: E.{Mr Elliott - Chief Engineer} A.{Mr Adams} C. MAIN (left cell): .375, .500, .1875 sq." MAIN (right cell): .500, .1875 sq." CONTROL (left cell): .275, .500, .1375 sq." CONTROL (right cell): .500, .1375 sq." --- Row 3: EAC. (Narrower brushes). MAIN (left cell): .280, .500, .140 sq." MAIN (right cell): .500, .140 sq." CONTROL (left cell): .187, .500, .0935 sq." CONTROL (right cell): .500, .0935 sq." --- NOT TO SCALE. EFC. | ||