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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).
Blueprint detailing inlet and exhaust valve timing diagrams for silent tappets.

Identifier  ExFiles\Box 17\6\  Scan344
Date  21th March 1919
  
LOAD MARKED ON DRGS TAKEN AT THIS POINT

INLET VALVE TIME
7.4° B.T.D.C.
TDC 5 LBS LOAD
3 LBS 1.0
1/2 LBS
CONSTANT LOAD OF 5 LBS
NO LOAD RECORDED
52.7°
I.C.
1 LB
1 1/2 LBS
2 LBS
3 LBS
4 LBS
6 1/4 LBS
18 LBS
27 LBS
32 LBS
33 LBS
32 LBS
26 LBS
B.D.C
21 LBS
16 LBS
13 LBS
10 LBS
8 LBS
6 1/4 LBS CHANGE OVER
5 LBS
1 DIVISION = 7.44°

EXHAUST VALVE TIME
A.T.D.C.
TDC 20 LBS
E.C.
12 LBS
8 1/2 LBS
7 LBS
6 LBS
4 1/2 LBS
3 LBS
2 LBS
NO LOAD
1/2 LBS E.O.
1 LB
1 3/4 LBS
2 LBS
3 LBS
3 3/4 LBS
4 LBS
1 DIV. = 7.4°
B.D.C.
CONSTANT LOAD OF 5 LBS
5 LBS
6 LBS
7 1/2 LBS
9 1/2 LBS
11 1/2 LBS
14 1/2 LBS
18 LBS
21 1/2 LBS
26 LBS
31 LBS
48°
86°

CHANGE OVER 5 1/2 LBS

SILENT TAPPETS - 40/50 28-EX

ROLLS-ROYCE LTD.
PRINT ROOM
MAR 21 1919
DERBY.
  
  


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