Air Core

Air core may refer to:

  • Air core drilling, a form of rotary air drilling
  • Magnetic core

Famous quotes containing the words air and/or core:

    “I remember when I was first assigned to jets. I said to the colonel, “Colonel, I joined this man’s air force to fly an airplane. But nobody’s gonna hitch me to no Roman candle.””
    —Kurt Neumann (1906–1958)

    “The threadbare trees, so poor and thin,
    They are no wealthier than I;
    But with as brave a core within
    They rear their boughs to the October sky.
    Poor knights they are which bravely wait
    The charge of Winter’s cavalry,
    Keeping a simple Roman state,
    Discumbered of their Persian luxury.”
    —Henry David Thoreau (1817–1862)