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).
Instructions for a test on a marine engine cooling system arrangement.
| Identifier | ExFiles\Box 133\3\ scan0189 | |
| Date | 3rd May 1940 | |
| 112-8 C. Caisley from Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation} c. Rm{William Robotham - Chief Engineer}/AA.{D. Abbot-Anderson} c. JNR.{Charles L. Jenner} Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation}3/JMS.3.5.40. As soon as you have cleared up the remaining details on the cylinder head job, the following test should be carried out: MARINE 80. PL.176 shows a proposed arrangement for the cooling systems as for a boat. The main idea of this test is to be able to ascertain just what is required to produce the following: We shall cater for full throttle running in the boat, at which condition the engine will be turning over at 2,500 r.p.m. Circulating water temperature should then be constant at 80 deg. C. and oil inlet at 100 deg. C. maximum. Also, the exhaust manifold will be water cooled. To produce this result, it is necessary to have an auxiliary oil cooler (as per sample Serck you have already) which can be controlled by: (1) Putting it in the line between the header tank, and suction side of pump. (2) Putting it between the water outlet from the exhaust manifold and the overboard discharge. The difference between these two possibilities are, that in (1) fresh water will pass through the cooler, and in (2) salt water will pass through the cooler. We are not concerned, however, with this factor at present. We only wish to know if (2) would work if (1) were found to be undesirable (too much restriction to the engine circulation). The engine circulating water will be controlled by an "inter-cooler" (which will be supplied later), which works on the same principle as the oil cooler except that salt water is the cooling medium which in turn is circulated by a second water pump driven off the tail end of the dynamo. Will you please start to collect together the necessary tackle to rig this system up, such as the second water pump (which could be a Wraith type to start with), the header tank, and connections. The existing test bed exhaust manifold is O.K. and only requires connecting into the circuit. We shall require to know temperature and flow through it, however. P.T.O. | ||