Who is credited with inventing the first mass-produced helicopter?
Helicopter helicopter include "chopper", "copter", "helo", "heli", and "whirlybird". Helicopters were developed and built during the first half-century of flight, with the Focke-Wulf Fw 61 being the first operational helicopter in 1936. Some helicopters reached limited production, but it was not until 1942 that a helicopter designed by Igor Sikorsky reached full-scale production, with 131 aircraft built. Though most earlier designs used more than one main rotor, it is the single main rotor with anti-torque tail rotor configuration that has become the most common helicopter configuration. Tandem rotor helicopters are also in widespread use due to their greater payload capacity. Coaxial
Inventing the AIDS Virus to be harmless." He argued that while Duesberg put forward a "changeable" mixture of ideas that could not be falsified. He accused Duesberg of ignoring contrary evidence and accusing others of being influenced in their views by political, psychological, and other forces but not himself. John Lauritsen, writing in his and Ian Young's anthology "The AIDS Cult: Essays on the Gay Health Crisis" (1997), credited Duesberg with cogently explaining the logic of Koch's first postulate and providing a clear explanation of how AZT functions as a "non-selective terminator of DNA synthesis." Inventing the AIDS Virus Inventing the AIDS Virus is