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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).
Analysis of internal glycol leaks and bearing failures in returned Merlin and X engines.

Identifier  ExFiles\Box 141\2\  scan0234
Date  31th May 1940
  
MERLIN III IV AND X ENGINES RETURNED FOR SERVICE
I.E. 380 BLOCKS OF 190 ENGS
BLOCKS TESTED FOR INTERNAL GLYCOL LEAKS.

TOP JOINTS

UNSHROUDED
RIBBED LINERS
90 BLOCKS
AVER HRS 145
CHART: 4 BLOCKS

.010" SHROUDED
RIBBED LINERS
210 BLOCKS
AVER HRS 103
CHART: 18 BLOCKS

.020" SHROUDED
RIBBED LINERS
MOD 64.
28 BLOCKS
AVER HRS 161
LEAKS
CHART: 1 BLOCK

.010" SHROUDED
RIBLESS LINERS
MOD 114
44 BLOCKS
CHART: NONE

.030" SHROUDED
RIBLESS LINERS
MOD 136.
8 BLOCKS.
CHART: NONE

BEARINGS OF 202 ENGINES EXAMINED

MAIN BEARINGS
1/2% SILVER
PARTIAL FAILURE
AVER HRS 149
CHART: 83 ENGS
TOTAL FAILURE
AVER HRS 148
CHART: 2

1% TIN
PARTIAL FAILURE
AVER HRS 23
CHART: 1
TOTAL FAILURE
AVER HRS 36
CHART: 3

CONNECTING RODS
PARTIAL BEARING FAILURE
AVER HRS 172
CHART: 9
TOTAL FAILURE
AVER HRS 104
CHART: 15

L/G.W.H.
  
  


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