In the 1984 Dune there were flying devices used by the humans but they were silent anti-grav vehicles not ‘ornithoptors’. These came to be in later versions. I have always felt that the ‘ornithoptor’ was a stupid idea as the beating of the ‘wings’ would produce a regular vibration. It was regular vibrations that attracted the worms - not always a good thing!
IMHO the more recent movies were entertaining but not as good as the 1984 version.
Yeah, but the worms only detect vibrations in the ground. So you don’t need to worry about vibrating the air when you are flying around in a ‘thopter.
It wasn’t just ‘regular vibrations’ that attracted the worms, but a slow, rhythmic beat.....................