Quote:
Originally Posted by mnmarcus
If you're the first one going through a very narrow tunnel you may experience some additional drag, IMO. 99% of the time I'd think any tunnel or wall would help you, again IMO...
This makes me rethink some of my drafting though... I've always tried to avoid driving next to a vehicle or even slightly behind (and in the other lane.) I've been trying to avoid their "wash". But thinking about it now, would that be better than still air? It's still moving (in some amount) in the direction I'm going. It seems like wind-noise goes up in this "dirty" air which (I think) is why I've tried to avoid it. Extra windnoise seems like extra drag. ???
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Next to and slightly behind does give an advantage. Look at the back sweep angle of plane wings and ducks flying in formation as examples. The air is churning and as a result, a low presure zone exsists.