Word: ruddering
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...like a boat without a rudder...
...Roderick A. Hilsinger, a professor at Temple University in Philadelphia, snatched the grenade and lobbed it toward an unoccupied part of the cabin. The grenade exploded with a muffled roar, wounding Hilsinger and six others. The blast also damaged an inboard engine as well as the plane's rudder controls; as acrid smoke filled the cabin, the jet went into a dangerous dive...
...flashback at age 17 polishing a friend's plane for flight lessons. Then he is off. In an F-84, thundering toward the target on a mock strafing run. In tight formation with the National Air Guard, tensely but proudly crowding in under his flight leader until the rudder of Bach's plane is blackened by the leader's exhaust. The voice of the late John F. Kennedy rises through a dissolve that shows a New Jersey Air Guard unit listening. When the President says he will activate Air Guard squadrons for a year because of the Berlin crisis...
Running Circles. To reduce the turbulence and at the same time increase the rudder's effective steering angle, a group led by Naval Architect Barry Steele, of Britain's National Physical Laboratory, revived an idea once proposed for aircraft wing flaps. They fitted rotating cylinders around the rudder posts of several ship models (see diagram). Equipped with its own small motor, the cylinder can spin in either direction. Thus when the rudder is pushed hard to port (left), for instance, the cylinder is rotated in a clockwise direction. This directs a flow of water against the back...
Encouraged by the tests with their models, the British researchers recently equipped a 200-ton cargo vessel with their super rudder. Tested off the Isle of Wight, the vessel ran circles around other ships of its size: it could turn on its own axis, stop in only seconds, and effectively operate with its rudder turned up to an angle of 90°. The British scientists concede that the device will probably not work as spectacularly with heavier ships. Their calculations show, however, that a 250,000-ton tanker should be able to turn completely around in only about...