I was talking about ram effect
Understood .. but that is a secondary consideration.
The end result of the pressure distribution acting on ancilliary structure can produce a significant force on that structure. Include some clever design .. and one gets a lunch heavily subsidised by Mother Nature.
CliveL, djpil (and, no doubt, others whose specific backgrounds I am not familiar with) being experienced aerodynamicists .. can speak on such things for ever and a day, I'm sure.