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).
The necessity to calorize two steel exhaust downtake pipes.
| Identifier | ExFiles\Box 54\4\ Scan005 | |
| Date | 24th March 1925 | |
| +4635 Ex. Dept. Copy to. c. Roy.{Sir Henry Royce} c. Hs.{Lord Ernest Hives - Chair} ------- BYS/H.{Arthur M. Hanbury - Head Complaints} 24.3.25. ------- It will be necessary for us to calorize the two steel exhaust downtake pipes both internally and externally. With reference to the ends of same, where the joints are made, it is not necessary to calorize them on these joint faces and close up to the nut. This constituted the difficulty we encountered when using calorizing before. The facts of the case are that with the asbestos cord lagging on the steel pipes, the steel pipes become so hot that they burn away very rapidly. In fact, the thickness of the material has almost disappeared during the 10,000 miles running in France. The modification should be made to the drawing at once, and pipes sent away for calorising without delay. The exposed bolts at the ends of the pipe round the joint should be particularly marked to the effect that they must be kept clear of the calorising effect. DICKINSON BOND BY.{R.W. Bailey - Chief Engineer} BH | ||