"Faulker Feuersturm"
by Rob Arndt: "Dr. Zippermeyer ... designed and built a series of highly unorthodox anti-aircraft weapons ... Dr. Zippermeyer constructed both a huge Wirbelwind Kanone (Whirlwind Cannon) and Turbulenz Kanone (Vortex Cannon). ... used a detonation of hydrogen and oxygen ..."