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).
Suitability of different radiator designs and construction methods.
| Identifier | ExFiles\Box 38\2\ Scan002 | |
| Date | 19th December 1918 | |
| To BY.{R.W. Bailey - Chief Engineer} from R.{Sir Henry Royce} To Da.{Bernard Day - Chassis Design} To EH. c. to CJ. c. to Wor.{Arthur Wormald - General Works Manager} X3456 R5/G19.12.18. X.3456 - RE RADIATORS FOR PARIS ETC. You will remember that I have written to Mr. Johnson stating that I am convinced that the radiator Hermann type would not be satisfactory. I find we have a honeycomb one on 7.CA which has been through much rough work, that was made in Paris by Moreaux. If we are likely to send anyone out to the French service station for the purpose of discussing this radiator situation with Mr. Berend, I would like Mr. Hives or myself or both to see them before they go. In England we propose to use either the round tube radiators with the ends not expanded at all or only expanded a little, or square tube radiator. The square ones would permit of bonding wires or strips being used. In the case of the tubes with hexagonal ends, the advocates admit that there is quite a large percentage of these which are split in the expanding. My argument is that there may be also a larger number which are nearly split which cannot be detected. I therefore recommend that the ends of the tubes are not expanded, but are fitted with light ferrules in the case of the round tubes, or with bonding and separating strips or wires in the case of the square tubes. In the case of bonding wires being used, the radiator is divided into blocks, and the bonding wire separating each block into, say, 16 or 25 tubes per block, and the bonding contd:- | ||