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Test results table showing compression and permanent set data for a solid type piston under various weights.

Identifier	ExFiles\Box 35\2\ scan 219
Date	29th March 1920 guessed

1 Solid TYPE Piston X2748 4.494 dia WEIGHT IN LBS \| COMPRESSION \| PERMANENT SET 26 \| .002 \| nil 36 \| .0025 \| " 46 \| .003 \| " 56 \| .0035 \| " 66 \| .004 \| " 76 \| .0045 \| " 86 \| .005 \| " 96 \| .0055 \| " 106 \| .006 \| " 116 \| .006 \| " 126 \| .006 \| " 136 \| .0065 \| " 146 \| .0065 \| " 156 \| .007 \| " 166 \| .007 \| " 176 \| .0075 \| " 186 \| .008 \| " 196 \| .0085 \| " 206 \| .009 \| " 216 \| .009 \| " 226 \| .0095 \| " 236 \| .010 \| " 246 \| .010 \| " 256 \| .010 \| " 266 \| .0105 \| "

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).