Just before the new Boeing Clipper took off for its first flight recently, it engaged in a tug of war on the waters of Puget Sound with a tugboat. The Clipper won. With the tug's engine in reverse, the four 1600-horsepower engines of the transoceanic flying boat easily pulled it forward. The purpose of the maneuver was to keep the Clipper from taking off while its motoxs were turned on for a full power test. On the actual takeoff the big ship lifted itself from the water after a 1,000-foot run. This was the first of six new Clippers built for Pan American Airways.