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).
Providing the approximate figures for a Packard plate clutch.
| Identifier | ExFiles\Box 127\1\ scan0013 | |
| Date | 2nd January 1912 | |
| X435 In reply to memo from Mr Bowen C32/B 301211 re Packard Plate Clutch. W. to S. 2/1/12. TBB2/L2112. The approximate figures of the Packard Clutch are as follows :- Diameter of clutch surface 15" Width of clutch surface 3" Outside diameter of flywheel 20" | ||