[sbierwagen]

The Wright Flyer massed 274 kg. Of course it could take off from an unprepared field-- with a modern engine, it could be doing nine foot takeoffs like in STOL competitions: https://www.youtube.com/watch?v=WMVjYT6laKo

The modern equivalent to a Wright plane would be something like a paramotor: https://www.youtube.com/watch?v=rvQ9DjJNal0