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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).
Complaints about excessive heat in the vehicle's cowl and driver's footwell.

Identifier  ExFiles\Box 74\3\  scan0144
Date  30th July 1925
  
ll X3708
Oy5-W-75025
July 30, 1925.
Mr. Claude Johnson,
Rolls-Royce, Limited,
London, England.
(Copy for attention of Mr. Royce
Mr. Platford
Mr. Hives )

Dear Sir:

Heat in Cowls

Complaints on this score have increased in the late hot weather, to such an extent that we desire to be prepared with acceptable cures for the trouble.

We get no complaint of gas in the body since discharging the breather gas below the car and deleting the cut out, and we know by actual comparison that our cowls are cooler than those on English cars because of the lack of the cut out slot and the partial closing of the accelerator slot.

Also, we fit asbestos sheet below all the front floorboards, which is a distinct help.

Adequate top and side cowl ventilators are fitted, all three facing forward, so that there is a considerable movement of air under the cowl when the car is in motion.

But in 100° summer weather the inside of the gearbox undersheet becomes so hot that the blast of air is intolerable to the hand when one floorboard is removed, and any tools carried under the front seat are too hot to touch.

The complaints are divided into two classes:-
(a) Complaints of drivers that their right feet are roasted on the accelerator pedal and their right leg gets hot up to the knee.
  
  


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