There are some projects that the Kremlin would love us to forget.
The Russian military has long been a bogeyman for the West, with Cold War memories lingering even after the fall of the Soviet Union.
However, over the years Russia's fierce competition has produced a number of duds alongside its successes, as the country has scrambled to stay one step ahead of its geopolitical rivals.
The following is a collection of some of the most ambitious military projects that resulted in spectacular failures.
The Tsar tank has achieved almost mythical status since the unusual vehicle was first tested in 1914. Due to weight miscalculations, its tricycle design often resulted in its back wheel getting stuck and its lack of armour left its operators exposed to artillery fire.
But it wasn't Russia's only tank failure. The Soviet Union's T-80 was the first production tank to be equipped with a gas turbine engine when it was introduced in 1976.
When it was used during the First Chechen War it was discovered that when the tanks got hit on their side armour, its unused ammunition exploded. The performance was so poor that the Ministry of Defence cancelled all orders for the tanks.
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