>>237
これ？

https://aviationweek.com/defense-space/aircraft-propulsion/engine-demonstrator-strengthen-uk-japan-fighter-ties

Engine Demonstrator To Strengthen UK-Japan Fighter Ties
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February 02, 2022
UK-Japanese Engine Demonstrator
The demonstrator will likely feature technologies from Rolls-Royce’s FCAS TI and IHI’s development of the XF9 indigenous fighter engine.

XG240なる謎えんじん、に関するリンク先なんだが
書いてないんだよね
…俺がデマ言ってると思うなら

読んでみる？