Russia
“That’s not gone well” Thursday: Russian S-300 surface-to-air missile engine ignition failure
“That’s not gone well” Thursday – ой дерьмо edition
Yakovlev M-501 and Zvezda M503 and M504 Diesel Engines
One of the largest aircraft engines every made, the 42-cylinder Yakovlev M-501 was modified into the Zvezda M503 marine engine. A further redesign created the 56-cylinder Zvezda M504.
Source: Yakovlev M-501 and Zvezda M503 and M504 Diesel Engines