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).
Explanation of the differences in the water and oil systems between the B.80 Marine engine and the standard motor car engine.
| Identifier | ExFiles\Box 133\3\ scan0187 | |
| Date | 22th April 1940 | |
| To. Rm.{William Robotham - Chief Engineer}/AA{D. Abbot-Anderson} c. Rm{William Robotham - Chief Engineer}/HH. 1128 Jnr.{Charles L. Jenner}14/JH. 22. 4. 40. B. 80. Marine Herewith FL. 176. The object of sending you this drawing is to explain how the Marine unit differs from the motor car engine. Some time this week I will make a preliminary specification of the engine. All the work that has been done is such that the original unit is altered as little as possible. Now for the explanation of the water system. Fresh Water System. The engine proper is cooled by fresh water, the water leaves the engine and flows in to the header tank, it then flows from the inter-cooler through the oil cooler and then back to the engine on the suction side of the conventional water pump. Salt Water System. There is a special gear pump driven from the aft end of the dynamo. The sea water is sucked up passes through the pump then through the inter-cooler and then to the bottom of the water cooled exhaust manifold at its centre. The outlets on the manifold are at the 2 ends from which points the salt water can either be passed overboard or fed inside the exhaust tail pipes as desired by the boat builders. Oil System. From the oil pump we bring up the pipe which runs to the oil cooler and then back to the oil galleries. From the gallery we have a pipe which runs to the new relief valve which measures off the pressure in the ordinary way. The over flow to the crankcase being exactly the same as now. JNR.{Charles L. Jenner} | ||