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).
Petrol and oil consumption test results with valve timing data for cylinders 1 and 6.

Identifier  ExFiles\Box 169\4\  img149
Date  25th March 1933
  
FILES.
25.3.33.
3.Per.II.
Petrol cons. Test over 170.5 miles, average speed 42.5 m.p.h. (Twin S.U. Carbs.) X.l needles used = 15.45 m.p.g.
Oil Cons. test shews .. 412 m.p.g.
Average air temp. 13°C.
Valve timing with .020" tappet clearance.
No.1 cyl.
I.O. 3.5° BTDC.
I.C. 38.5° ABDC.
E.O. 37.5° BTDC.
E.C. 8° ATDC.
No.6 cyl.
I.O. 3.5° BTDC.
I.C. 40° ABDC.
E.O. 36° BTDC.
E.C. 7.5° ATDC.
F.Dodd.
  
  


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