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).
Water boiling issues in the Goshawk engine's cooling system due to an ineffective fan or drive.
| Identifier | WestWitteringFiles\I\May1922\ Scan105 | |
| Date | 5th May 1922 | |
| R.R. 325A (100 T) (S.H. 798. 10-12-20) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2947 ORIGINAL. To Hs.{Lord Ernest Hives - Chair} from R.{Sir Henry Royce} c. to SJ. Wor.{Arthur Wormald - General Works Manager} c. to Rg.{Mr Rowledge} Ry c. to HF.{H. W. Frost - Coachwork Inspector} Hy{Tom Haldenby - Plant Engineer} R1/M26. 5. 22. RE GOSHAWK - WATER COOLING SYSTEM. X766 X4240 (1) The reason for the water boiling is entirely due to the ineffective working of the fan or it's drive. (2) We cannot expect the radiator to be efficient with a following wind, unless the fan is working properly. (3) Elsewhere we shew the modifications to make a larger and slower speed fan which would be easier to drive owing to it's larger pulley. (4) Occasionally however we must expect the fan belt will be neglected or circumstances will be such that the water will boil, in which case we must endeavour that steam only be discharged, and the minimum possible quantity of water. Then the boiling can go on for some time without damage. This time should be ascertained. (5) We cannot expect the engine to run without water in the head, and if it does run we should expect a cracked head, which fortunately is much easier to replace than cracked cylinders. (6) To obtain the result desired in para. 4, we must make the engine so that it does not accumulate steam in the water space of the head or the cylinders. In this respect we may find that our present system of pipes, though neat, is not ideal. (7) It will be remembered that the Marmon is considered by all of us to have perhaps the best engine which is turned out in America. This engine has water connections which can be compared with ours, also Napiers, and many others. Hg (1) RECEIVED MAY 29 1922 | ||