>>787-788, 790
23年3月のエンジン3社合意とともに実際に共同開発を開始した (have initiated development of the engine)ことと
両者が実際に人員と技術の交換を始めていてプロトタイプを20年代後半までに完成させることを目指していることを伝えるのが
23年3月15日のJanes記事。RRによる初年度のプランニングと下準備を経てエンジン共同開発事業は予定通り進行中。
基地外無限ループしても無駄だからさっさと成仏しろ。

(2023/03/15)
Atsushi Sato, vice-president of IHI's aero-engine, space, and defence businesses, told Janes at the DSEI Japan 2023
exhibition in Chiba that the two companies are starting to exchange personnel and technologies following the signing
of a joint development agreement in December 2021. Sato said that the collaborative programme – named the ‘joint
demonstrator engine' project – aims to prove capabilities including power generation and thermal energy management
in an engine that is sufficiently compact for the GCAP fighter. “We are now sending IHI engineers to Rolls-Royce and
they are sending engineers to us in Japan,” said Sato. “There are a lot of new technologies that need to be validated.
Another priority is the design of the engine to ensure it can be integrated into the new fighter aircraft.” He said the two
companies aim to develop an engine prototype by the late 2020s to enable integration into the initial batches of GCAP
fighters to be produced from the mid-2030s. Initial tests of the engine will take place in the UK, he said.