An engine variety known as an autothruster was used by the Galactic Empire; they equipped both the TIE/IN interceptor and the TIE/d "Defender" Multi-Role Starfighter with this technology. The First Order later adopted it for use in their TIE/vn space superiority fighters.
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The autothruster was first identified in Star Wars: X-Wing Second Edition — First Order Conversion Kit.
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Star Wars: X-Wing Second Edition — Hotshots and Aces Reinforcements Pack (Card: "Rush" — TIE/vn Silencer)
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Star Wars: X-Wing Second Edition — Skystrike Academy Squadron Pack (Card: Sensitive Controls)