Aerodynamic - Pushing Air

So much of cycling has to do with pushing air.  We think it relatively insignificant because we can't really `see' the air we're pushing.  But those who cycle a fair amount know what it is like to ride into a headwind. 

At `performance' level cycling one of the major determinants of `performance' has to do with reducing your wind profile. 

I've been playing around with `getting aero' in the last few weeks.  Here are some pics of my noodling:

Below are some pics of the relatively `non-aero' position.

In the end, however, it is all about the `engine.'