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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).
Test results for hydraulic tappets, measuring plunger resistance with various loads.

Identifier  ExFiles\Box 17\6\  Scan341
Date  20th March 1935
  
-3-

Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux}28/KW.20.3.35.

28-EX - Hydraulic Tappets.

Resistance of plunger with various loads.
Plunger and oil temperature 80°C.

Time in secs. taken for oil to escape and movement of plunger.

Weight applied
Time taken in resistance of oil for .0625 drop.

50 lbs.
.0625" 7 secs.
.0625" 8 "
.0625" 9 "
.0625" 10 "

40 lbs.
.0625" 9 secs.
.0625" 10 "
.0625" 10 "
.0625" 11 "

30 lbs.
.0625" 11 secs.
.0625" 11 "
.0625" 12 "
.0625" 12 "

25 lbs.
.0625" 14 secs.
.0625" 18 "
.0625" 18 "
.0625" 19 "

Hs{Lord Ernest Hives - Chair}/G.W.Hancock.
  
  


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