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).
Comparison of Rolls-Royce and Westinghouse starting motors, detailing performance metrics.

Identifier  ExFiles\Box 23\2\  Scan077
Date  18th May 1921 guessed
  
COMPARISON OF ROLLS-ROYCE AND WESTINGHOUSE
STARTING MOTORS.

R.{Sir Henry Royce} P. M.{Mr Moon / Mr Moore}
TORQUE @ 1 Ft. WEST. R.R. % INCREASE
1 3900 2740 40
2 2780 1990 40
3 2310 1590 45
4 1960 1350 45
6 1430 1050 36
8 1050 850 23.5
10 780 670 16.

EFFICIENCY
WEST. R.R.
58 52.5
63 61.5
63.7 63.5
63.5 62.8
61.5 56.5
57. 48.5
50 40.

AMPERES
WEST. R.{Sir Henry Royce} R.{Sir Henry Royce}
82 54
120 78
149 97
173 111
221 140
269 168
318 196

HORSE POWER
WEST. R.{Sir Henry Royce} R.{Sir Henry Royce} % INCREASE
.64 .48 33.5
1.08 .74 46.
1.33 .91 46.
1.52 1.08 40.5
1.68 1.22 38.
1.69 1.32 28.
1.56 1.31 19.

TEMPERATURE 80° F.{Mr Friese}

AUTOMOTIVE ENGINEERING DEPT.

R.{Sir Henry Royce} G.{Mr Griffiths - Chief Accountant / Mr Gnapp} THOMPSON, ENGINEER.
R.{Sir Henry Royce} G.{Mr Griffiths - Chief Accountant / Mr Gnapp} Thompson
  
  


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