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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).
Table of speed test results in m.p.h. for a car under various altered conditions compared to a standard configuration.

Identifier  ExFiles\Box 29\3\  Scan165
Date  7th September 1927 guessed
  
contd :- -5-

STANDARD CONDITION OF CAR - HOOD DOWN - LOUVRED BONNET - C.O. OPEN - HIGH PRESSURES TYRES - UNDERSHIELD AND TAIL IN POSITION.

Alteration from standard condition. | Speed m.p.h.
| full lap. | half mile.
Plain bonnet - hood up. | 83.99 | 86.54
" " - hood down. | 85.57 | 88.24
Standard. | 86.54 | 89.11
C.O. closed. | 83.33 | 87.7
Undershield off. | 86.09 | 88.67
Balloon tyres. | 85.72 | 88.24
Tail removed. | 85.6 | 88.24
Front wings removed. | 87.53 | 89.55

Hs{Lord Ernest Hives - Chair}/W.A. Robotham.
  
  


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