I've done this, or very nearly this. In mid-2001 I had to fly from San Jose to Washington Dulles with a Sun Netra 1120 server. It's 4U and FULL length. Weigh

I've done this, or very nearly this. In mid-2001 I had to fly from San Jose to Washington Dulles with a Sun Netra 1120 server. It's 4U and FULL length. Weighed about 60 pounds. I was late for my flight and the datacenter I retrieved it from had no packaging for it so I just carried it onto the plane - bare. It fit in the overhead.