Aero Linx: DIY Drones
An Unmanned Aerial Vehicle (UAV, colloquially known as a "drone") is basically an aerial robot. As we define it, it is capable of both remotely controlled flight (like a regular RC aircraft) and fully-autonomous flight, controlled by sensors, GPS, and onboard computers performing the functions of an autopilot. The site's UAVs include airplanes, helicopters, quadcopters and blimps. Most of them are under five pounds, and some of them (especially the blimps) can be used indoors.
Discrete Frequency
A separate radio frequency for use in direct pilot-controller communications in air traffic control which reduces frequency congestion by controlling the number of aircraft operating on a particular frequency at one time. Discrete frequencies are normally designated for each control sector in en route/terminal ATC facilities. Discrete frequencies are listed in the Airport/Facility Directory and the DOD FLIP IFR En Route Supplement.
"The Next-Generation 737's success is the result of years of expertise that thousands of employees continue to build into every Boeing 737 used in private, government and commercial service... It is an incredible milestone to be delivering our 4,000th Next-Generation 737. We thank China Southern Airlines and all our customers who have made the 737 the world's most popular jetliner."
Source: Beverly Wyse, vice president and general manager of the 737 program, following the dleivery of the 4000th 737-NG.
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