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).
Proposal to modify the 20 HP slipper flywheel to match the Phantom design and an instruction for testing new friction materials.
| Identifier | ExFiles\Box 5\6\ 06-page015 | |
| Date | 29th September 1927 | |
| BY.{R.W. Bailey - Chief Engineer} from E.{Mr Elliott - Chief Engineer} c. to BJ. Hs.{Lord Ernest Hives - Chair} VS{J. Vickers}300 E2/M29.9.27. SLIPPER FLYWHEELS. 20 HP. & PHANTOM. X.5300 X.8300 With reference to the recent designs of slipper flywheels, we propose to modify the 20 HP. to make it similar in design to the Phantom, replacing the corrugated driving plate with serrations. Would you kindly instruct that the fibre used for the friction surfaces should not be more than .062 thick. This fibre can be if necessary pegged by means of wooden pegs driven through it into holes drilled in the backing plates. Would you also please instruct for experimental test friction discs in woven cotton, and in cork. E.{Mr Elliott - Chief Engineer} | ||