On my trip back to Jacksonville yesterday, I took off from Denver airport in an Airbus 320 headed for ORD.
My question about the Airbus 320 is this (yes, it is a newbie type question), I somehow always manage to sit just behind the wing and I noticed what I can only describe as "pylons" hanging attached to the bottom of the wing (3 on each wing) and I was wondering what they were for.
Also, why do some planes have winglets and others don't? What do they do??