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 vertical but in its top part, they are angled outwards to clear the body of the vehicle. 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 By the 1930s they were obsolete having been replaced by wheels pressed from heavy-gauge steel sheet or in sports cars and lightweight cars, by wire spokes.