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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).
Design and modification of Universal Mechanics Type Joints, noting issues with stiffness.

Identifier  ExFiles\Box 48\1\  Scan093
Date  13th February 1929
  
DA. {Bernard Day - Chassis Design}
c. Hs. {Lord Ernest Hives - Chair}
c. Wer.
Y4183
BY9/G.13.2.29.

UNIVERSAL MECHANICS TYPE JOINTS.
-----------------------------

Referring to DAL/M12.2.29. we are not wanting a further design for these pieces, as we have produced improved parts working from the pieces used in the original joints, which previously we had not seen.

It is quite possible that machining modifications led us to make a somewhat lighter piece than the N.Sch., but as you agree the N.Sch. itself is not sufficiently stiff. I am afraid we did not appreciate at the time that tightening the joint up affected the fit on the pin.

Hs {Lord Ernest Hives - Chair}

BY. {R.W. Bailey - Chief Engineer} By
  
  


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