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OrpheusはFCAS用エンジンのベースだな
内蔵発電機があるし

Rolls-Royce Defence has delivered a new gas turbine demonstrator engine, known as Orpheus, designed, built and tested in under two years to prove innovative technology developments for FCAS. Working with international partners, Rolls Royce have also agreed the next stage of the full-scale engine demonstrator programme.

https://www.gov.uk/government/news/uk-builds-momentum-on-combat-air-programme-with-demonstrator-set-to-fly-within-five-years