The 2S4 Tyulpan (often spelled Tulpan, Russian: 2С4 «Тюльпан»; ...
wikipedia - 23 May 2022The 2S4 Tyulpan (often spelled Tulpan, Russian: 2С4 «Тюльпан»; English: tulip) is a Soviet 240 mm self-propelled heavy mortar. "2S4" is its GRAU designation. The Tyulpan is the largest mortar system in use today.[2]