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).
Questioning the effectiveness of an extra oiling system controlled by vacuum in the induction pipe.
| Identifier | ExFiles\Box 16\1\ Scan071 | |
| Date | 2nd March 1915 | |
| R.I Wor{Arthur Wormald - General Works Manager}/EHS/L2315. Re extra oiling controlled by the vacuum in the Induction Pipe. R/740 Na{Mr Nadin}/S. 2.3.15. In reply to Mr Royce's memo R1/IB24215, I still do not understand or cannot appreciate the claims for this system of oiling. Attached herewith is a curve which was taken on a standard engine, the engine was run full throttle at 2000 revs and the vacuum measured. I understand that with that amount of vacuum the extra oiling is on full. We then reduced the speed of the engine by applying more load and gradually closed the throttle so as to maintain the same vacuum in the induction pipe. It will be seen on the curve that the vacuum in the pipe at 400 revs (10 miles per hour), with the throttle only opened to the extent of the slots, is the same as at 2000 revs. with full throttle. If we understand the scheme correctly so that this curve represents the time the extra oil would come in, I do not think we can expect very good results from this system, as the engine would get full oil when it is | ||