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).
Extract regarding experiments with clutches for the 'Hawk' and 20 HP 'Goshawk' chassis using ferodo linings.
| Identifier | ExFiles\Box 74\2\ scan0303 | |
| Date | 17th April 1920 | |
| X.3525 X4244 Extract from R7/G17.4.20. X.3481. X.3786. RE 20 H.P. CHASSIS ("GOSHAWK"). X.3525. X.3408. We shall be anxiously awaiting the result of the experiments with clutches, both belonging to the "Hawk" and the 20 H.P. giving a moderate number of surfaces fitted with ferodo loose linings between them. | ||