Artillery wheel Artillery wheel 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
Are Years What? (for Marianne Moore) mobile with wire, shaped like a "V". "Are Years What? (for Marianne Moore)" is signature of di Suvero's monumental early 1960s "open-work constructions." These works utilize cast-off construction materials like chains, metal bars, and ladders. This sculpture is the first that di Suvero built, from beginning to end, with I-beams and using a crane, solely by himself. "Are Years What?" was originally in the collection of the artist, then the collection of Enrico Martignoni of Winnemucca, Nevada. Hirshhorn director James Demetrion first saw the sculpture when it was on display in Brooklyn's Prospect Park. The sculpture was acquired by the