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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).
Chart comparing overheating test results for the Silver Ghost and Hispano Suiza models.

Identifier  ExFiles\Box 24\5\  Scan060
Date  15th May 1925
  
OVERHEATING TESTS SILVER GHOST AND HISPANO SUIZA

CONDITIONS OF TEST
ATMOSPHERIC TEMPERATURE AT WHICH THE COOLING WATER WILL INEVITABLY BOIL DRIVING FOR SUFFICIENTLY LONG ON FULL THROTTLE AT THE SPEED AND UNDER THE CONDITIONS SPECIFIED
N.B. ENGINE WILL NOT BOIL AT TEMPERATURES COVERED BY LINES
DEGREES CENTIGRADE
5 10 15 20 25 30 35 40

40/50 SILVER GHOST
48 TUBES
21 1/4" MATRIX HEIGHT
ROAD SPEED 30 M.P.H.
STANDARD VENTILATION 4'X10 S

TEST CONDITIONS (SILVER GHOST):
- NO FAN
- STANDARD NO VENTILATION
- REAR SHUTTERS OPEN
- FRONT SHUTTERS OPEN
- ALL SHUTTERS OPEN
- LOUVRES BONNET
- BONNET TOP OFF
- BONNET SIDES OFF

HISPANO SUIZA
LOUVRES STANDARD
ROAD SPEED 30 M.P.H.

TEST CONDITIONS (HISPANO SUIZA):
- NO FAN
- STANDARD

STAMPED TEXT:
R.D.D.
Pr.{Percy H. Rose}
15 MAY 1925
De.

HANDWRITTEN TEXT:
14/5/25 B-M
  
  


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