Rolls-Royce Archives
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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 challenges of designing Duplex Induction Systems for optimal performance at both high and low speeds.

Identifier  ExFiles\Box 142\1\  scan0124
Date  14th March 1938
  
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very well at high speeds, it requires a very large
induction pipe to do this. There are several ways of
producing Duplex Induction Systems, and I should like
to know whether Mr. Taub has any experience on the best
way to go about the job.

We have never yet made a car that did not
lose crispness in low speed pick up when we put it on an
induction pipe that was the right size for the top end
of the power curve.

Vauxhall manifolds seem to indicate that Mr.
Taub has not been any more successful in dealing with
the problem than we have.

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