Different valve design schemes and a suggestion for a simpler, more visible valve for the driver.
| Identifier | ExFiles\Box 75\2\ scan0077 | |
| Date | 5th August 1920 | |
| Contd. -2- Da {Bernard Day - Chassis Design} 3/CB5.8.20. "N" scheme 521 has a serrated knob and a somewhat smaller sylphon tube, but we thought that the size of tube shewn on "N" scheme 526 was probably more suitable. On "N" Scheme 526 are shewn - a screw for lifting the valve, operated by a handle, details of the locking device for which are shewn in Fig. 3. On Fig. 4 is shewn a suggestion for operating the valve by means of a cam surface. An objection that we ought there was to all these devices, is that a man can be on his reserve compartment without any warning, and can work as well with the reserve valve shut as with it open. We had intended to suggest that a valve either of the needle and sylphon-tube type, similar to your LeC.1267, or a simple plug cock, similar to the standard air cocks, could be mounted on the instrument board, and connected by a single pipe to the tank, and by a short pipe to some part of the air system, so that it would be constantly under the driver's eye, and he would see on which supply he was at a glance. It would also be convenient to operate. We are not doing any more work on this but I intended to mention it to Mr. Royce when I see him on tuesday. For one thing we are rather afraid of the sylphon tube from the point of view of getting it. Da. {Bernard Day - Chassis Design} | ||
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).