The artillery wheel was developed for use on gun carriages when it was found that the lateral forces involved in horse artillery manoeuvres caused normally-constructed cart wheels to collapse. Rather than having its spokes mortised into a wooden nave (hub), it has them fitted together (mitred) then bolted into a metal nave. Its tyre is shrunk onto the rim in the usual way but it is also bolted on for security. A normal wagon wheel is dished so that in its lowest part, the spokes are perpendicular to the ground thus supporting the weight (with the axle not truly horizontal but angled downward toward the outside about 5 degrees). This is not done with artillery wheels.
When higher speeds and consequently higher lateral forces were attained with the introduction of motor vehicles, the artillery wheel was used in those too. By the 1920s, motor cars used wheels which looked at a glance like artillery wheels but which were of forged steel or welded from steel pressed sections. These too were usually called artillery wheels. By the 1930s they were obsolete having been replaced by wheels pressed from heavy-gauge steel sheet or in sports cars and lightweight cars, by wire spokes.
Famous quotes containing the words wheel and/or artillery:
“You do me wrong to take me out o th grave:
Thou art a soul in bliss, but I am bound
Upon a wheel of fire, that mine own tears
Do scald like molten lead.”
—William Shakespeare (15641616)
“We now demand the light artillery of the intellect; we need the curt, the condensed, the pointed, the readily diffusedin place of the verbose, the detailed, the voluminous, the inaccessible. On the other hand, the lightness of the artillery should not degenerate into pop-gunneryby which term we may designate the character of the greater portion of the newspaper presstheir sole legitimate object being the discussion of ephemeral matters in an ephemeral manner.”
—Edgar Allan Poe (18091845)