A laboratory investigation of ice cutting with a lightweigt electromechanical drill

Abstract

A lightweight mechanical ice core drill of shallow depth capability was tested in a cold laboratory to obtain basic chracteristics of electromechanical drills in connection with a development of a deep ice core drilling system. We obtained the following results. (1) The total energy is consumed one-third for ice cutting and two-thirds for barrel rotation. (2) For efficient ice cutting, large rake angle and adequate edge load are essential. (3) Apossibility is shown for continuous measurement of shear stress of ice during ice coring.