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).
Design improvements for shutters, clutch, accessories, plating, and future engine progress.
| Identifier | ExFiles\Box 65a\3\ scan0213 | |
| Date | 3rd May 1930 | |
| R1/M.3.5.30 contd. -2- from the frame to the axle, inside the pin having become involved, or been carried out with parts that do not seem simple and good enough to be called practical. Can Da.{Bernard Day - Chassis Design} with help from E.{Mr Elliott - Chief Engineer} and Hs.{Lord Ernest Hives - Chair} devise a simpler more straightforward scheme, more suitable for Australia. (3) The next point is the thermostatically operated shutters. In spite of our careful working out at WW. it now seems better to make them double acting with easy means of detachment in the event of wishing to open them for all-time, say in hot climates et c. This will cancel the powerful spring at least, but I fear we ought to keep the more gentle spring, so that if really loose they will not rattle, and the vibration will take up the slack always one way. My particular point is to make the thermostat work at a much lower temperature than was our practice with P.1. hand regulation. This is now possible with the better cold distribution and exhaust heated throttle. (4) CLUTCH Before standardising the fabric carried driven member we ought to to try to reduce its inertia because it was slower to change, and we do not like increasing the clutch brake much, it makes changing more difficult. I suggest as previously, duralumin disc to mount the fabric, or very much thinner steel. (5) The L.H. item was the re-arrangement of some of the accessories for greater accessibility, particularly the petrol filter and klaxon to be transferred to the other side. (6) Chromium plating has not yet proved a success with us. Has anyone including the Americans, got it right? If we can satisfactorily use Staybrite for the radiator this would get over the doubt of the plating standing, and also there would be no need to alter the design for the sake of the plating process. FUTURE PROGRESS. (6) The long duration cams and slight increase in comp. ratio shewn by Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} to be better for high speed power are equally good for low speed, and will be slightly better for consumption which is now getting very heavy. This is quite an old idea and should be moving soon. It is better for valve springs as inlet is always the worst, we now also make inlet lighter, and although Austenitic steels are a disappointment we can still have the heavier pattern of exhaust | ||