Rolls-Royce Archives
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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).
Performance comparison of square and round radiator tubes at full throttle and low speeds.

Identifier  ExFiles\Box 15\1\  Scan405
Date  14th October 1930 guessed
  
COMPARISON OF SQUARE & ROUND TUBES AT FULL THROTTLE LOW SPEEDS.

FULL THROTTLE TEST. CAR BRACED TO MAINTAIN REQ'D SPEED.

TYPES OF RADIATOR MATRIX.
ALL CLOSED.
50 M.P.H. | 45 M.P.H.

LOUVRED BONNET.
30 M.P.H. | 45 M.P.H.

6. mm. Parallel Square Tube E.{Mr Elliott - Chief Engineer} 81385.
21.5° C. | 24.75° C.

Standard 6/7½ mm. Tubes. E.{Mr Elliott - Chief Engineer} 73448.
13° C. | 16° C. | 24° C. | 27.5° C.

FIGURES GIVEN CRITICAL ATMOSPHERIC TEMPERATURE OR TEMPERATURE AT WHICH THE CAR WOULD EVENTUALLY BOIL IF DRIVEN FOR SUFFICIENTLY LONG UNDER THE CONDITIONS OF THE TEST. FIGURES WITH LOUVRED BONNET ACTUALLY RECORDED BUT SHOULD BE CONFIRMED. AT PRESENT USEFUL FOR COMPARING TWO TYPES OF RADIATOR ONLY.
  
  


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