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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).
Notes on a scheme for providing a two-gallon spare fuel capacity in the American petrol tank.

Identifier  ExFiles\Box 135\2\  scan0004
Date  24th October 1919
  
X.3701

Extract from E1/G24.10.19.

NOTES ON MATTERS DISCUSSED DURING VISIT OF MESSRS.
BARRINGTON AND HIVES TO WEST WITTERINGHenry Royce's home town ON 23rd INST.

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AMERICAN PETROL TANK. X. 3687. X.3701. X.4160

by
The scheme approved of/Mr.Royce for providing a sapre two gallon of fuel in the tank is to take the existing petrol cock off the chassis, make a cock with two ways and a shut-off position, and place it on the petrol tank. It should be put in communication with two pipes, one which will empty the tank all but two gallons, and the other which will completely empty the tank. The handle of the cock should project over the filler cap in the spare two gallons position so that the driver after-filling his tank, will be induced to leave the cock handle in such a position that the spare fuel will not be used up.

The pipe which is supposed to completely empty the tank, may dip into a little pocket or not as desired, so as to make the whole of the fuel available. Mr. Royce thinks that it is almost possible to unscrew the present large glange on the tank, and fit a new unit embodying the features aforementioned. The petrol tank should be fitted with a magnetic level indicator of the ordinary type.

X.4160 With this system of arranging the tank, the delivery filter should be transferred to the carburettor float-chamber, while the present ingoing filter should be retained.
  
  


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