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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).
Acceleration test results for vehicle 49-GB at Brooklands with a standard axle and 1/8' liners under cylinders.

Identifier  ExFiles\Box 29\3\  Scan084
Date  16th June 1920
  
R.R. 199 (250T) (SD676 19-7-17) MP180865
16.6.20.
--------
49-GB AT BROOKLANDS.

Standard Axle - 1/8" liners under cylinders.

ACCELERATION TESTS.

M.P.H. seconds. Condition.

10 to 20 5
10 to 30 10.5
10 to 40 16.5 Hood up -
10 to 50 23 Screen up -
10 to 60 30.5 Cutout open.

10 to 20 4.5
10 to 30 10
10 to 40 15.5 Hood down -
10 to 50 22 Screen up -
10 to 60 30 Cutout open.

10 to 20 4
10 to 30 10
10 to 40 16 Hood down -
10 to 50 23 Screen down -
10 to 60 30 Cutout open.

10 to 20 5
10 to 30 11
10 to 40 16.5 Hood up -
10 to 50 24 Screen up -
10 to 60 33.5 Cutout closed.

10 to 20 5
10 to 30 10.5
10 to 40 16 Hood down -
10 to 50 24 Screen up -
10 to 60 34 Cutout closed.

10 to 20 5
10 to 30 10.5
10 to 40 16.5 Hood down -
10 to 50 23 screen down
10 to 60 30 cutout closed.
  
  


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