Hi,
I'm not an expert on the matter but this reminded me of a video I saw a few weeks ago of a completely printed (RC) aircraft:
3D printing: The world's first printed plane - tech - 27 July 2011 - New Scientist
While searching for this vid also found this:
3D-printed jet engine parts help increase fuel efficiency by 15 percent | The Verge
So apparently there is a future for 3D printing...
Rgds