> I always thought Dune had lower gravity, would also explain how the worms work. On page 79 of 'Dune' (my 1973 paperback copy), when the Atreides soldiers fir

> I always thought Dune had lower gravity, would also explain how the worms work. On page 79 of 'Dune' (my 1973 paperback copy), when the Atreides soldiers first land on Arrakis, a group of them 'shout and roister' as they disembark. One of them says 'Nine-tenths of a G by the book'. Another says 'Feel that under your dogs? That's gravity, man.' So not massively different from Earth-normal. Not sure if is this enough to affect the feasibility of a winged craft (or sandworms). On that note, air pressure would also affect the feasibility of winged vehicles, as in the difficulty of trying to fly a (small) helicopter on Mars.