Jim Crow

… flying cannon equipped Spitfires V’s mainly on ‘Jim Crow’ operations (operational Patrols along the home coastline intercepting any hostile aircraft and looking out for any invasion forces).

Two other machines exhibited by Whitworth… One was furnished with a reversing tool to plane both ways, and called, from its peculiar motion, a Jim Crow machine.

When rails have to be bent with a Jim Crow, as in setting stock or check-rails, or straightening a bent rail, they should always be heated first, or they are liable to crack, especially steel rails.