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).
Explaining the methodology for comparing the Mean Effective Pressure (M.E.P.) of foreign cars with the company's own 40/50 chassis.

Identifier  ExFiles\Box 32\5\  Scan161
Date  3rd June 1921
  
x1692
To E.{Mr Elliott - Chief Engineer} from Hs.{Lord Ernest Hives - Chair}
Hsl/LG3.6.21.
x1692
x3317
HORSE POWER CURVES OF FOREIGN CARS.
The M.E.P. given for Foreign cars is taken from the horse power obtained on the dynamometer. It includes the losses in transmission and road wheels. They can be compared with the curve of M.E.P. of our own 40/50 chassis of the dynamometer horse power.
Hs.{Lord Ernest Hives - Chair}
(R.L. 288A (100) (1) H.S.) 10.12.20 G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2948
  
  


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