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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).
Outlining the design and instructions for the Wraith III radiator shutters.

Identifier  ExFiles\Box 9\3\  03-page026
Date  22th March 1937
  
SECRET.
To BY.{R.W. Bailey - Chief Engineer}
Copy to Mr. Ria. RMe. HRE. Fmn/Std.

Wraith III Radiator Shutters.

On the designs of the radiator N.Sch.5069 and N.Sch.5077 we showed full particulars of the dixtampo lower bearing strip for the radiator shutters having the adjustable ball ends. As these shutter bearings are now adjustable there is no need for the lower bearing strip to be in three parts as if necessary each shutter can be erected separately.

The shutters are intended to be exactly the same as on the present 25/30 H.P. with the exception of the cut-out in the centre two shutters to clear the starting handle "cuckoo trap".

On N.Sch.5097 herewith we show details of the top bearing strip which is sweated to the radiator outer shell, and also particulars of the controls, which are all the same as the original Wraith II design with the exception of the length of the links coupling the shutters to the thermostat.

With the information shown on N.Sch.5097 and on N.Sch.5069 and N.Sch.5077 we believe you have complete instructions for the radiator shutters.

Ev.{Ivan Evernden - coachwork}

Att:N.Sch.5097.
  
  


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