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).
Letter discussing vacuum feed systems and a hot spot induction system for low-grade gasoline.
| Identifier | ExFiles\Box 180\M1\8\ img011 | |
| Date | 1st July 1921 | |
| TOR.R. of America Inc. From R.{Sir Henry Royce} -2- RS{Sir Henry Royce's Secretary}/G12/7/21 Contd. A small fitting could be attached to this plate, sufficiently large to carry the filter and the pipe connection. If we could use a vacuum feed to these large cars, which appears to be pretty general in the States, most of the troubles with the tank would disappear. For instance, you could have the side filler and a satisfactory vent pipe from the middle of the tank. The joints would not demand such heavy fittings, and so many screws. In the tank for the smaller cars which we have designed lately, we have adopted a lighter and simpler arrangement, and we send you a print shewing how far we have got. Vacuum feed is bad because on a long hill one might use up all the small tank holds before closing the throttle enough to obtain another charge, but to some extent this is not so likely to occur now as the reservoir of the Autovac has been increased in capacity. You might let me know how this fitting would give satisfaction; I am doubtful, but we are fitting it to our smaller model. HOT SPOT INDUCTION SYSTEM ETC. x4305 Regarding the heated induction system for the low grade gasoline, there is not the slightest doubt that it would be waste of time to fit anything but an equipment which is proved to be a distinct advance on what we are at present fitting. Your arrangement on our tests shews no distinct improvement, and as we cannot adopt everything we must have something better. It is probable with your limited means of testing that you were at a disadvantage owing to some slight temperature difference in the water heated throttle, or profile of the pipes. Personally, I think you are doing quite wrong in abandoning the thermostat control of the circulating water, because this ensures the highest temperature possible around (contd.) | ||