If-17 Armored Vehicle
A Soviet armored vehicle design from the 1940s that was intended to be a fast, lightly armored vehicle, but was ultimately not produced due to design flaws.
If-16 Naval Mine
A British naval mine design from the 1940s that was intended to be a high-yield, long-lasting mine, but was ultimately not deployed due to technical issues.
If-15 Aircraft Engine
A Japanese aircraft engine design from the 1940s that was intended to be a powerful, high-performance engine, but was ultimately not produced due to material shortages.
If-14 Artillery Shell
A German artillery shell design from the 1940s that was intended to be a high-explosive, long-range shell, but was ultimately not produced due to the war’s end.
If-13 Anti-Tank Weapon
A British anti-tank weapon design from the 1940s that was intended to be a high-powered, portable weapon, but was ultimately not deployed due to technical issues.
If-12 Infantry Weapon
A Soviet infantry weapon design from the 1940s that was intended to be a lightweight, high-capacity weapon, but was ultimately not produced due to design flaws.
If-11 Military Communications System
A German military communications system design from the 1940s that was intended to be a secure, high-speed system, but was ultimately not deployed due to technical difficulties.
If-10 Naval Gun
A Japanese naval gun design from the 1940s that was intended to be a large-caliber, high-velocity gun, but was ultimately not built due to the war’s end.
If-9 Radar System
A British radar system design from the 1940s that was intended to be a high-power, long-range radar, but was ultimately not deployed due to technical issues.
If-8 Rocket Launcher
A Soviet rocket launcher design from the 1940s that was intended to be a mobile, multiple-rocket launcher, but was ultimately not produced due to design flaws.