The Tsar Tank (Russian: -), also known as the Netopyr' () which stands for Pipistrellus (a genus of bat) or Lebedenko Tank ( ), was an unusual Russian armoured vehicle developed by Nikolai Lebedenko ( ), Nikolai Zhukovsky ( ), Boris Stechkin ( ), and Alexander Mikulin ( ) from 1914 onwards. The project was scrapped after initial tests deemed the vehicle to be vulnerable to artillery fire.