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Reminds me of this DOS jewel, Triplane Turmoil, which must have been inspired by Sopwith: https://www.mobygames.com/game/23228/triplane-turmoil/

Yeah, the first thing that came to mind. One of the gems of the 90s Finnish shareware gamedev scene.

Edit: Huh, I had no idea it has a sequel, released by 2006: https://www.mobygames.com/game/30613/triplane-turmoil-ii/