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).
Leaking radiator tubes caused by the omission of a rubber washer at the rear end.
| Identifier | ExFiles\Box 38\2\ Scan160 | |
| Date | 2nd September 1921 | |
| R.R. 199 (250T) (SD679 19-7-17) MP180865 X3456 EP.{G. Eric Platford - Chief Quality Engineer} from BY.{R.W. Bailey - Chief Engineer} c. Hs.{Lord Ernest Hives - Chair} BY5-P2.9.21. X3456 CHASSIS - RADIATORS. Referring to your memo EP{G. Eric Platford - Chief Quality Engineer}/Thn12/H26821, with regard to radiator tubes leaking, and dealing particularly with the sample tube you supplied me with, which had failed on test where the bolt carrying the blanking plate passed through the radiator, there is no doubt at all in my mind but that the failure is due to the omission of the rubber washer at the rear end. The inertia effects of the blanking plate are very considerable. These inertia effects should be taken up on the solid face of the matrix where the tubes are all soldered together. In the absence of a supporting ring in the expanded end of the radiator tube the bolt will rest on the bottom of the tube where the section changes from 7 mm. to 8 mm. diameter. The bumping up and down of the chassis will then throw excessive loads on the light radiator tube where it is unsupported by solder. On examining the sample supplied to me it shows clear indications of this effect, as the bottom line of the tube is almost a straight line from the commencement of the 7 mm. diameter. Would you kindly write to all car depots and draw to their attention the extreme importance of inserting either rubber or fibre washers, particularly in the rear end of the radiator tubes where the blanking plate bolt passes through the tube and is supported by same. BY.{R.W. Bailey - Chief Engineer} [STAMP] FO SEP 2 1921 RECEIVED. | ||