Here is another article that I remember having submitted once: https://www.esa.int/Enabling_Support/Space_Engineering_Technology/World-first_firing_of_air-brea

Here is another article that I remember having submitted once: https://www.esa.int/Enabling_Support/Space_Engineering_Technology/World-first_firing_of_air-breathing_electric_thruster https://www.esa.int/Enabling_Support/Space_Engineering_Techn... Edit: since this article mentions "SITAEL" and some authors of the paper submitted here seem to work for "SITAEL" as well, it might be talking about the same thing. I'll keep the comment here anyways.