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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).
The investigation into timing gear failures and proposed endurance tests for a solution.

Identifier  ExFiles\Box 136\1\  scan0299
Date  11th July 1938
  
1155

To Sy. from Rm.{William Robotham - Chief Engineer}
c. SG.{Arthur F. Sidgreaves - MD}
c. Ha.
c. Da.{Bernard Day - Chassis Design}
c. RRC.
c. Hx.
c. Da{Bernard Day - Chassis Design}/Jnr.{Charles L. Jenner}

RM.{William Robotham - Chief Engineer}1/MR.11.7.38.

TIMING GEAR BATTLES.

The attached report indicates that we believe we have now tracked down the source of this trouble. Endurance tests to prove the durability of the camwheel under the improved conditions will be undertaken almost immediately.

If successful, it should not be difficult to apply the cure to the 25 Wraith cars already produced.

This explanation would seem to fit in with the distributor drive failures.

We are repeating the tests on a standard Bentley unit.

RM.{William Robotham - Chief Engineer}
  
  


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