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).
Requesting the average wear rate on Goshawk II clutches and comparative test results for three different Ferodo clutch fabrics.
| Identifier | WestWitteringFiles\J\February1923\ Scan23 | |
| Date | 28th February 1923 | |
| ORIGINAL TO HS.{Lord Ernest Hives - Chair} FROM E.{Mr Elliott - Chief Engineer} RE. CLUTCHES. X4244 X3409 Could you kindly say what is the average rate of measured wear on Gos. ll. clutches, say per 10,000 miles? Referring to the ferodo fabrics we are familiar with 3 kinds, that which is bonded with brass wire, that which is made of woven asbestos containing no metal bond, and the third kind which we understood was being experimented with made by pressing broken or powdered asbestos into solid plates under enormous pressure . Could you kindly say if we have tested the co-efficient of friction of these 3 varieties of fabric and if we have tested them to destruction in the Goshawk clutch relative to each other, and if so, with what result. E.{Mr Elliott - Chief Engineer} | ||