On Dec 9, 3:11*am, "Matt Herron Jr." wrote:
What keeps rain, wasps, mice, etc. from entering the vent hole when on
the ground?

The same thing that keeps them from coming in through: the apple core
window, the nose vent, the spar carry through, the wheel well, ie.
nothing :-)

Look at it this way - when the ship's assembled and on the line,
there are lots of easier ways for varmints to get in. When it's
disassmbled in the trailer, there are huge holes where the wings used
to be.