Hber-3

The third prototype of the Heinkel He 177, further refined with improvements to the engines, aerodynamics, and armament. This prototype played a crucial role in shaping the final design of the production model.

Hber-4

The fourth prototype of the Heinkel He 177, featuring a redesigned cockpit and improved defensive armament. It was used for extensive flight testing and evaluation before the aircraft entered full production.

Hber-1

The initial prototype of the Heinkel He 177, built in 1939. It differed significantly from later production models and was primarily used for testing and development purposes.

Hber-2

The second prototype of the Heinkel He 177, featuring improvements over the Hber-1, including refined engines and a revised fuselage design. It was also used for testing and evaluation before the aircraft entered production.

Gv. 24 (Type 24)

A Japanese medium tank prototype developed during World War II, designed to be a more powerful and heavily armored medium tank. It featured a 75mm gun and thick armor, but was never mass-produced due to wartime production constraints.

Gv. 25 (Type 25)

A Japanese heavy tank prototype developed during World War II, designed to be a more powerful and heavily armored heavy tank. It featured a 120mm gun and thick armor, but was never mass-produced due to wartime production constraints.

Gv. 26 (Type 26)

A Japanese light tank prototype developed during World War II, designed to be a more agile and versatile light tank. It featured a 47mm gun and lighter armor, but was never mass-produced due to wartime production constraints.

Gv. 27 (Type 27)

A Japanese medium tank prototype developed during World War II, designed to be a more powerful and heavily armored medium tank. It featured a 75mm gun and thick armor, but was never mass-produced due to wartime production constraints.

Gv. 28 (Type 28)

A Japanese heavy tank prototype developed during World War II, designed to be a more powerful and heavily armored heavy tank. It featured a 105mm gun and thick armor, but was never mass-produced due to wartime production constraints.

Gv. 29 (Type 29)

A Japanese light tank prototype developed during World War II, designed to be a more agile and versatile light tank. It featured a 37mm gun and lighter armor, but was never mass-produced due to wartime production constraints.