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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).
Development and road testing of a modified throttle-edge carburettor for a 25 HP car.

Identifier  ExFiles\Box 179\2\  img140
Date  8th January 1932
  
ORIGINAL.

To R.{Sir Henry Royce} (At Le CanadelHenry Royce's French residence) From Hs.{Lord Ernest Hives - Chair}
c. to Sg.{Arthur F. Sidgreaves - MD}
c. to WCr.
c. to E.{Mr Elliott - Chief Engineer}
c. to Da.{Bernard Day - Chassis Design}
c. to By.{R.W. Bailey - Chief Engineer}

Hs.{Lord Ernest Hives - Chair}7/WJ.8.1.32.

X5080.

25 HP. CARBURRETTER.

We have a 25 HP. car running on the road with a modified standard carburetter using throttle-edge scheme of slow running. With this scheme we can use larger throats which give us a definite increase in power.

The other advantages we can expect from the results of our tests so far, are that we should get better slow running than the present standard carburetter, and also much less tendency for explosions in the silencer.

The scheme we are running is simply a mock-up arrangement. R.{Sir Henry Royce} has promised to prepare a design right away and we expect to be able to get this on to a car before it goes to France. the

Hs.{Lord Ernest Hives - Chair}
  
  


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