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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 H.M. Hobson, Ltd. regarding the testing and design issues of a K.S. Petrol Gauge.

Identifier  ExFiles\Box 61\3\  scan0163
Date  9th March 1931
  
X4038

Expl. Dept.

Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}4/MJ.

March 9th.1931.

Messrs. H.M. Hobson, Ltd.,
47-55, The Vale,
Acton,
LONDON. W.3.

For the attention of Major Searight.

Dear Sir,

K.S. Petrol Gauge.

We now have the single line petrol installation on test. Attached is a blue print of the scale we have marked off. We should like you to give us a permanent, either painted or engraved, scale to use with this head.

We also attach a print of the tank unit with which you supplied us which was made to Mr. Royce's instructions. As far as we can recollect the 20 HP. tank unit which you lent us had a very much more smaller dome carrying the air leads. As you will appreciate, a bulbous excrescence such as that shewn on this print, does not enable a rear apron to be made that will cover it up. Furthermore, there is the difficulty of any spilt petrol running down behind the apron and also petrol vapours doing the same thing, both of which from our experience tends to promote fumes in the body.

We should be very interested if you would let us know at your earliest convenience whether any further information with regard to either of the two points we raise is available from your own experiments or from those conducted by the King Seeley Corporation, America. At the present moment we are having to hold up the single line installation which we should like to adopt from every other point of view, whilst we investigate means of overcoming the drawbacks enumerated.

Yours faithfully,
  
  


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