In the Lord of the Rings fandom there’s a persistent debate whether balrogs, or Durin’s Bane specifically, have wings. The text in Fellowship is ambiguous whether what it is describing are literal wings or something else wing-like.
In the Lord of the Rings fandom there’s a persistent debate whether balrogs, or Durin’s Bane specifically, have wings. The text in Fellowship is ambiguous whether what it is describing are literal wings or something else wing-like.
Fans do both.
Just sucking or blowing involves filling or emptying an air reservoir, as the air you suck needs to go somewhere and the air you blow has to come from somewhere. So something like a bellows does them in separate stages.
But a fan pushes air with its blades and other air moves in to replace it, so it’s doing both simultaneously.