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Brushless DC Motors
finishes. Because they have no commutator, brushless motors are more efficient, need less maintenance, and can operate at higher speeds than conventional dc motors. High efficiency and small size are especially important for military, aircraft, and. Brushless DC Motors | Machine Design. Skip
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RC Model Aircraft Motor Control
will describe the design and construction of two small speed controls appropriate for flying model airplanes up to 6 lbs. Many of the control techniques in this application note can easily be used with larger DC motors in different applications. AN847 RC Model Aircraft Motor Control AN847. RC Model
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Switches put a new spin on motors
. A potentiometer or keypad manually controls the motor, or a transducer or serial link can provide automatic control. The motor combines features of ac and dc motors but also has unique characteristics. Its salient-pole stator is similar to a dc machine and does not create a rotating field, as used
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A century of progress in aircraft materials - Part 2 Metals
years later, the DC-3 was introduced, and that all-metal, multiengine monoplane became the first money-making airliner. Boeing's P-26 Peashooter. America's first metal fighter plane. Boeing's P-26 "Peashooter" mixed old designs and new materials to come up with a fighter fast enough to keep up
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Pharmaceutical Flight Support
I could tell by the grim tone of the caller that something bad had happened. My favorite airplane, a D-Day veteran DC-3 now hauling smoke jumpers, had just suffered some major damage and two friends had been at the controls. The crew had been taxiing for departure from Casper, Wyo.'s Runway 3 when
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Where adhesives beat mechanical fasteners
light cures the adhesive in seconds. The assembly of commutators for dc motors has historically involved metal processes such as soldering and brazing. However, both require postjoining finishing steps so the commutator can remain in balance rotate at high speed (typically 3,600 rpm). Securing
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Big Three Auto CEOs Attacked For Bizjet Use
, D.C. for as little as $288 on Northwest Airlines, rather than spending an estimated $20,000 each to fly between those two cities on their corporate jets. Ross's report, which aired last week, also noted that Chrysler, Ford and General Motors have collectively spent "several hundred million dollars
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Optimizing Method Applied (.pdf)
Consider, for example, specifying the lightest possible three-phase dc-brushless motor for use in a miniature aircraft. ./5fd1f7b2-a4f9-400b-8c19-191795eb89d2