NASA's Manned Maneuvering Units used compressed nitrogen. But I'm not sure there'd be a huge benefit to having indoor/outdoor capabilities in a single drone. Yo

NASA's Manned Maneuvering Units used compressed nitrogen. But I'm not sure there'd be a huge benefit to having indoor/outdoor capabilities in a single drone. You'd have to cycle the airlock every time it went in or out, and it would be bulkier and less efficient in either mode than a dedicated unit.