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).
Modifications to the Continental Phantom petrol pump to improve high-speed fuel output.
Identifier | ExFiles\Box 19\1\ Scan166 | |
Date | 12th January 1932 | |
HS.{Lord Ernest Hives - Chair} ) FROM E.{Mr Elliott - Chief Engineer} BY.{R.W. Bailey - Chief Engineer} ) C. to Sg.{Arthur F. Sidgreaves - MD} Wor.{Arthur Wormald - General Works Manager} PETROL PUMP - CONTINENTAL PHANTOM. E1/M/12.1.32. X. 7120 X7120 When in Derby we went over the position of the above with RM.{William Robotham - Chief Engineer}, and the progress that had been made towards obtaining satisfactory output at the higher speeds without using excessive pressure in the fuel feed to the carburetter. We recommended the use of still larger valves, and it was agreed to make up a pump with .312 clear hole through valve seats which it was thought could be done in the existing casting quickly. There is no room on P.2. to increase the dia. of the pump itself, and moreover the pump is quite large enough provided the fabric will stand up to the work expected of it. The problem appears to be analogous to getting more HP. out of a small engine by running it faster, and fitting larger valves and passages. At the same time we propose to use air chambers over the top of both delivery and suction valves. We think it is very urgent to get these still larger valves tested so that we can arrive at some final scheme for improving the volumetric efficiency of the pump. There are one or two further points requiring attention as follows: (1) The pitch circle dia. of the holes in the fabric diaphragms should be .1 larger than in the pump flanges. (2) The pump flanges should be increased in thickness we think to .25" where they grip the fabric. (3) The pin carrying the bell crank lever will not stay tight in the bracket. We propose to make this pin a press fit in the bracket and then secure it with a thin nut riveted up. The nut will require a suitable recess in the crankcase for clearance. E.{Mr Elliott - Chief Engineer} | ||