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).
Continuation of a report on pump testing, detailing delivery rates, air consumption, and observations from a Kestrel carburetter test.
| Identifier | ExFiles\Box 61\3\ scan0330 | |
| Date | 1st April 1932 | |
| -2- Hs{Lord Ernest Hives - Chair}/Aln.1/MA.1.4.32.cont'd.{John DeLooze - Company Secretary} We confirmed the previous result that the interposition of a lift head (represented by a cock) increased the air consumption without altering the petrol flow through a given orifice; air leakage into the petrol being again almost non-existent. The maximum delivery of the pump is about 340 pints per hour, air consumption being .58 cu.ft. per min. The maximum delivery which the large Nermark compressor could maintain at its normal speed of 1125 R.P.M. would be 775 pts per hour at ground level. We found that after standing overnight a certain amount of petrol gets into the exhaust air which did not happen on the old pump. A test was made in which the pump was attached to a Kestrel carburetter to observe the steadiness of the feed. Various flows were obtained by draining the float chamber. Flooding occurred when the flow was such as to produce the high pressure pulsations mentioned above, but not otherwise. The amount of flooding however, was probably not enough to increase the petrol flow when running on an engine. The weights of the present pump and regulating valve are 7 lbs. 12 ozs. and 10 ozs., respectively or together 14 ozs., more than the combined weight of the previous models. In operation, apart from the pressure fluctuations described, the working of the apparatus is very satisfactory and reliable. The equipment is now available for fitting to a test-bed engine for observations on its regulation and durability. Hs{Lord Ernest Hives - Chair}/F.J.Alan. 1 Sheet att: | ||