Shrink Solidworks File Size

Hi,

So I downloaded a model at GrabCad.com. The file is of a Boeing 737 Airplane. I was wondering if there is anyway to compress that file (possibly into one surface without the multiple surfaces and sketches) so that it is not as large as it is.

For the purpose I'm using it for, I don't require much detail because I plan to be performing fluid testing on it. So essentially, all I need is the shape of the airplane.

SolidworksImport export