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 from the American branch to Derby discussing the Autopulse Fuel Pump's performance and installation.
| Identifier | ExFiles\Box 41\1\ Scan019 | |
| Date | 28th July 1926 | |
| X3800 ROLLS-ROYCE OF AMERICA, INC. SPRINGFIELD, MASS. Oy1-E-72826 July 28th, 1926. Mr. E.{Mr Elliott - Chief Engineer} W. Hives, Rolls-Royce, Ltd., Derby, England. (Copy for the attention of E.F.C.) Dear Hives: Re Autopulse Fuel Pump Have just received report E.F.C.1/T13.7.26 on this matter. Have had a single unit at work on my car for about 6000 miles without any trouble except slight leakage at the unions due to the use of a soft die-cast metal for the head. We have the idea that a single unit is not quite enough to take care of the maximum demands of the Phantom in accelerating. Also we believe the double unit has an additional element of reliability. Do not mount the instrument on the dash, as the drum effect of the metal dash makes the noise objectionable. The device ties another vital part of the car to the battery, which is a theoretical disadvantage. Actually however in this country batteries can be obtained in emergency at almost any store or farmhouse and no one dreams of using a car with a dead battery. The use of a starting handle has been forgotten to such an extent that it is with the utmost difficulty we remind our own men that it is a useful instrument for testing compressions. The even feed from the Autopulse as compared with the conventional vacuum feed is an advantage. Another advantage we believe is that by connecting a vacuum gauge with the top of the stand-pipe in the gas tank we believe we can obtain a sensitive and reliable fuel-level meter to read on the instrument board. | ||