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).
Methods for radiator temperature control, including screening and a water bye-pass system.
| Identifier | ExFiles\Box 38\2\ Scan041 | |
| Date | 28th May 1919 | |
| R.H. 285A (500 T) (S.D. 408. 28-4-17.) Bm. 2/158/13. To EH. from R.{Sir Henry Royce} c: to CJ. c: to BN.{W.O. Bentley / Mr Barrington} X.3563 X.3456.✓ R7/G28.5.19. RE RADIATORS Regarding the screening of the radiator, I have suggest- ed{J. L. Edwards} that you fit to existing cars a piece of ply wood, or other suitable material, with a round hole to admit the draught for the fan. This should have the right size of hole for English temperatures. With such an arrangement we ought to get very little difference in the rise of temperature with the following wind, and with a head wind. This is what we want for ordinary use. I should be pleased also if you would investigate the possibilities of using a bye-pass instead of shutters over the radiators, that is, we must not throttle the circulation of water, but turn it into a bye-pass. This scheme would appear to be quite satisfactory, with the exception that in very cold weather the radiator might freeze. Possibly the resistance to the radiator would be such that the passage to the radiator need not be tightly closed when the bye-pass is open, and therefore there would always be a slight circulation of water through the radiator, which would prevent it freezing, except in the very coldest climate, when the whole thing should be wrapped up in a cosy. Kindly let me know exactly what the Packard do. R.{Sir Henry Royce} | ||