Gh.K. 43 (Anti-Tank Gun)
A German 50mm anti-tank gun designed during World War II but not adopted for service. It was intended to be a more powerful and effective anti-tank weapon than the earlier Gh.K. 40 but never saw widespread use.
Gb 48 (Germany)
A German 170mm anti-tank gun, a prototype weapon that was never fully developed or deployed. It was designed to counter the most formidable Allied tanks but was deemed too impractical for widespread use.
Fx-136 (Japan): Rocket-Powered Amphibious Aircraft
A Japanese prototype rocket-powered amphibious aircraft designed in the late 1940s, incorporating experimental rocket propulsion, but never entered production due to the end of World War II.
Fx-137 (Japan): Rocket-Powered Flying Boat Aircraft
A Japanese prototype rocket-powered flying boat aircraft designed in the late 1940s, incorporating experimental rocket propulsion, but never entered production due to the end of World War II.
Fx-138 (Japan): Rocket-Powered Heavy Bomber Aircraft
A Japanese prototype rocket-powered heavy bomber aircraft designed in the late 1940s, incorporating experimental rocket propulsion, but never entered production due to the end of World War II.
Fx-139 (Japan): Rocket-Powered Long-Range Bomber Aircraft
A Japanese prototype rocket-powered long-range bomber aircraft designed in the late 1940s, incorporating experimental rocket propulsion, but never entered production due to the end of World War II.
Fx-125 (Japan): Jet Heavy Bomber Aircraft
A Japanese prototype jet heavy bomber aircraft designed in the late 1940s, incorporating jet propulsion technology, but never entered production due to the end of World War II.
Fx-126 (Japan): Jet Long-Range Bomber Aircraft
A Japanese prototype jet long-range bomber aircraft designed in the late 1940s, incorporating jet propulsion technology, but never entered production due to the end of World War II.
Fx-127 (Japan): Rocket-Powered Fighter Aircraft
A Japanese prototype rocket-powered fighter aircraft designed in the late 1940s, incorporating experimental rocket propulsion, but never entered production due to the end of World War II.
Fx-128 (Japan): Rocket-Powered Bomber Aircraft
A Japanese prototype rocket-powered bomber aircraft designed in the late 1940s, incorporating experimental rocket propulsion, but never entered production due to the end of World War II.