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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).
Letter to G.W. Hancock regarding the delivery of pistons, connecting rods, and the performance of petrol pumps.

Identifier  ExFiles\Box 82\1\  scan0216
Date  21th August 1933
  
x rs{Sir Henry Royce's Secretary}

G.W.Hancock Esq.,
Hotel de France,
Chateauroux,
Indre,
FRANCE.

From Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}

Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}5/MA.21.8.33.

I have today wired you as follows:-

DODD LEAVING WITH PISTONS AND THREE
CONNECTING RODS TOMORROW MORNING
TUESDAY.

The Works have been working hand to
mouth on pistons while they get tools for
production. The result was we had none we
could send.

Thank you for your note re petrol pumps
etc., and the sketch showing where you have fitted
them.

The position seems admirable if the pumps
will deliver sufficient fuel under these conditions.
You will appreciate that the full magnetic force of
the solenoid is available to overcome restriction
on the suction side whereas the return spring only
deals with the restriction on the delivery side.
Therefore if you are short of petrol the only
alternative is to increase the strength of the
delivery spring slightly. Naturally we want to
keep this spring as light as possible so that the
danger of flooding is the minimum, and consistent
slow running can be obtained.

We are rigging up an alternative arrangement
putting the pumps on a bracket rising up from the
frame in the lower half of the steering column.
We shall also try your arrangement.

We are making rig tests and will give you
all the news we can about the deliveries of the pump
under the conditions in which your pumps are working.

Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}
  
  


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