Boeing Co.'s giant 747-8 freighter should make its first flight Monday after performing well on taxi tests and reaching a top speed of about 103.5 mph, the company said.

 

At 250 feet long, the plane is the largest Boeing has ever built and about 18 feet longer than the existing 747-400 jumbo jet. The company conducted taxi tests on the freighter Saturday at Paine Field in Everett, north of Seattle.