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).
Note on the 20 HP chassis regarding not reducing the weight of the flywheel and clutch.
| Identifier | ExFiles\Box 5\6\ 06-page048 | |
| Date | 15th May 1929 | |
| X5300 BY/THE c. Hs.{Lord Ernest Hives - Chair} BY1Q/G.15.5.29. 20 HP. CHASSIS. ----------- Please note that it is important in view of the heavier pistons we are likely to fit owing to the increased bore that we should not reduce the weight of the flywheel and clutch on the 20 HP. chassis, as this would tend to increase the amplitude of the over-running vibration. BY.{R.W. Bailey - Chief Engineer} B H | ||