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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).
Modification to an exhaust heated throttle by altering its internal contour.

Identifier  ExFiles\Box 50\3\  Scan197
Date  23th September 1921
  
To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair}
c. to CJ.
c. to E.{Mr Elliott - Chief Engineer}
c. to Da.{Bernard Day - Chassis Design}
c. to EY.
c. to EWT. for R.R.Inc.

X4305

Hs{Lord Ernest Hives - Chair}4/LG23. 9. 21.

X.4305. EXHAUST HEATED THROTTLE.

We have found that we can correct the distribution of this throttle by altering the contour of the inside. We have done this by filling it up with wax. We are now having the cores altered so that we can reproduce the shape of the casting. We find that, what is required is, symmetrical passages from the throttle.

Hs.{Lord Ernest Hives - Chair}
  
  


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