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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).
Engine exhaust fumes entering the vehicle body and a proposed solution using a modified exhaust pipe.

Identifier  ExFiles\Box 38\4\  Scan091
Date  11th June 1925
  
To Hm.{Capt. W. Hallam - Head Repairs} from R.{Sir Henry Royce}
c. to CJ. BJ. Hs.{Lord Ernest Hives - Chair}

+3436

R4/M11.6.25.

RE. ENGINE EXHAUST FUMES IN BODY.

X. 8230
X. 3436 X. 3908

I saw BJ. on this subject, and admitted that I had noticed the same fault, the smell coming from the end of the exhaust, following the body, and creeping in at the door clearance through the a joint.

My suggestion is that we try a swan neck of increased length, possibly looking down, or in some way that the exhaust fumes are left behind on the road surface instead of being trailed behind the car in its wake.

R.{Sir Henry Royce}
  
  


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