travelled to within 1/8 inch of the end, as had been estimated, giving a total compression ratio of 288 to 1.
Result. The
surfaces of the end plug, the fore end of the piston, and the
circumference of the bore up to 3/8 inch from the end of the plug had
been fused to a depth of about 0-01 inch and were glass hard, the
surface of the copper pin had been vaporised and copper sprayed over
the surface of the end plug and piston.
The
end plug showed signs of compression, and the bore of the block for 3/8
inch from the plug was enlarged by 0-023 inch in diameter, both
deformations indicating that a pressure of above 15,000 atmospheres had
