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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).
Maximum speed test results for vehicle 19-EX, detailing test conditions, setup, and performance data.

Identifier  ExFiles\Box 11\4\  04-page112
Date  19th July 1932
  
To Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}
From G.W.H.

X7941

Hotel de France,
Chateauroux,
FRANCE.

19.7.32.

MAXIMUM SPEED TEST. 19-EX.

Conditions same as previous tests. Practically no wind was blowing on this test.

Camshaft E.82446
Valve Timing.
as first brought out.
I.O. 5.58° P.T.D.C.
I.C. 54.75° P.B.D.C.
E.O. 11.16° P.B.D.C.
E.C. 46.5° B.B.D.C.

One driver & passenger.
Axle Ratio 12 X 41.
Wheels 19".
Ballast in rear 110 lbs.

Ignition. Magneto 7° B.T.D.C.
Battery 12° B.T.D.C.

Total Times for flying half mile, In & Out.

SECS. AVERAGE M.P.H. Carb. Needle.

43.6 82.56 Cut-out closed 90° needle
42.2 85.31 Cut-out open 90° needle
42.0 85.72 Cut-out open 90° needle
41.6 86.54 Cut-out open 85° needle
42.0 85.72 Cut-out open 85° needle

One direction only:-
20.6 87.38 Cut-out open 85° needle


[Signature]
G.W.H.
  
  


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