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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).
Torque reaction vibrations caused by chassis modifications and a proposal to fix the issue by refitting the original cross member.

Identifier  WestWitteringFiles\P\2July1926-September1926\  Scan150
Date  9th September 1926
  
To: [REDACTED]
From: Hs.{Lord Ernest Hives - Chair}
C. to: [REDACTED]
C. to: [REDACTED]

ORIGINAL.

Hs{Lord Ernest Hives - Chair}3/LG9.9.26.

EAC.1. X9950 X9380

In its original form this chassis was remarkably free from torque reaction vibrations, it was such that it was remarked upon by everyone who drove it.

Since we have modified the chassis it is now no better than our standard car. We are of the opinion that the difference has come about due to the alteration to the front of the frame, reducing its stiffness. You will remember originally the chassis had a very stiff sheet metal cross member, but this was done away with and the standard parts fitted in order to lower the radiator.

We propose replacing the original cross member to confirm that the torque reaction vibrations are greatly reduced when this is fitted.

Hs.{Lord Ernest Hives - Chair}
  
  


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