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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).
Bending of silencer outlet pipes on cars during testing.

Identifier  ExFiles\Box 38\4\  Scan009
Date  11th February 1920
  
Hs.{Lord Ernest Hives - Chair} from EP.{G. Eric Platford - Chief Quality Engineer}
C. to EH.
C. to BY.{R.W. Bailey - Chief Engineer}
C. to DA.{Bernard Day - Chassis Design}

X3486

EPL1/F11.2.20.

Re. Silencer Outlet Pipes.

I am rather concerned lately to note that several of these pipes on cars on test have become bent, causing them to catch on the axles. I have concluded that this has been due to the handling on test.

I have found, however, that the failure chiefly took place when cars were run on the dynamometer, and action was taken to make sure that there was no load added to this pipe by the fixing of the dynamometer exhaust pipes.

We still find that this trouble takes place, and chiefly on the dynamometer, when the pipe appears to get into a worse condition as regards heat.

Although I have no experience of this taking place on cars actually on the road, I bring this to your attention as a point which could be given closer investigation whilst you are carrying out your 10,000 miles test on the road, as I feel that under the above conditions we are a little too "weak".

The pipe is very easily bent, and the exhaust drain piece at the end I think could be made lighter to advantage, also the pipe itself may be strengthened up to advantage.

EP.{G. Eric Platford - Chief Quality Engineer}
  
  


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