Word: rotors
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...feared, because Clinton pumped in that $25 billion last week, but it doesn't solve the problem of their being too many Pentagon projects in the future and not enough money," Thompson says. BTW: Thompson says the Marines got some good news: they'll receive 500 V-22 tilt-rotor helicopters to replace the 20-year-old CH-46 choppers currently...
...chopper, pilot Dan Jollota was struggling to hold his aircraft steady while 15 Rangers "fast-roped" to the ground by sliding down a 40-ft. line at a rate only slightly more controlled than a free fall. In the cockpit, Jollota could hear the thunk-thunk-thunk of his rotors punctuated by the deadly whoosh of rocket-propelled grenades. With two Rangers still on the ropes, the chopper took a direct hit that chewed holes in a main rotor blade. The steel-nerved pilot bit off the impulse to flee. "It was remarkable," said a crewman aboard a nearby helicopter...
...craft combining the vertical talents of a helicopter and the horizontal speed of a normal airplane, would become "a stone in the air" if it lost power while making the change from one mode to the other. Tragically, that proved to be the case for the prototype tilt-rotor aircraft as it was landing at Quantico Marine Base in Virginia. Just as the Osprey was shifting from horizontal to vertical flight, with its propellers at a 60 degrees angle, it plunged into the Potomac River, killing all seven people on board...
...1980s showed the researchers that they knew almost nothing about building machines that could withstand and harness the turbulence of wind. Early models used blades of a type originally designed for helicopters. Since wind pressure could vary considerably from one end of the blade to the other, the rotor would wobble wildly and eventually break off. Sudden gusts of wind could overpower the machine and burn out its energy- converting turbine. Some engineers tried solving the problems by building heavier machines, but that simply made them more expensive...
...vets are afflicted with serious cases; an additional 350,000 display more moderate symptoms. PTSD is a state of extreme arousal caused by the virtual nonstop release of adrenaline and other similar substances into the bloodstream. When cars backfire, PTSD patients generally hit the dirt. The sound of helicopter rotor blades causes some to conceal themselves in trees. A baby's cry can invoke instant rage. Put in nonclinical terms, says psychiatrist Staten, the symptoms of PTSD are "like experiencing one's most threatening nightmares." A recent medical study found that the adrenaline levels of PTSD sufferers remain higher during...