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).
Proposed test for honeycomb radiator leakage caused by unequal thermal expansion.
| Identifier | ExFiles\Box 78\3\ scan0077 | |
| Date | 15th April 1915 | |
| To. Wer. for Hy.{Tom Haldenby - Plant Engineer} from R.{Sir Henry Royce} Copy to J.{Mr Johnson W.M.} " Na.{Mr Nadin} EAC Replies in SO 16547/1015 R2/1B15415. April 15th.1915. Re. Radiator Bumping Tests. ----------------------- I think the honeycomb radiator should be carefully criticised to see whether the unequal expansion has anything to do with the leakage. It was this, rather than the mechanical strength which made me suggest the bonding that ran right through to the upper and lower tanks and to the side plates. Up to the present I believe we have received one radiator in which the bonding has passed right through. This is the one made with bricks and wires. I can only suggest that we apply excessive and vigorous cooling to some parts of the radiator, while other parts are exposed to the hottest water that we can procure. Sopposing that you supplied the top of the radiator with boiling water, and you took one of the blower types of fan and cooled certain sections of the radiator (such as central vertical strips and circular patches) by a nozzle from the fan covering up the rest of the radiator. So that you could test a radiator with the central part quite fairly cold and the edges hot, and see whether the local expansion and contraction would cause any leakage, and if so, whether the radiator with through bonding was better than the other types. To get the cooling very local, one might use some form of water cooling of the radiator, as it would not be difficult in the honeycomb pattern to fit a rubber joint to each side, and some simple form of casting which would subject a section of the radiator to the severe chilling of cold water, say iced water, while passing boiling water through the radiator. [Footer] R.R. 286A (300 H) (V.S) (H.{Arthur M. Hanbury - Head Complaints} 442. 21-8-15) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 1001. | ||