An Unmanned Aerial Vehicle (UAV) is an aircraft that has the capability of autonomous flight, without a pilot in control. Amateur UAVs are non-military and non-commercial. They typically fly under “recreational” exceptions to FAA regulations on UAVs, so long as the pilots/programmers keep them within tight limits on altitude and distance. Usually the UAV is controlled manually by Radio Control (RC) at take-off and landing, and switched into GPS-guided autonomous mode only at a safe altitude. (Confused by all the acronyms and unfamiliar terms in UAVs? A glossary is here.)
---1) An RC plane, muticopter (quadcopter/hexacopter/tricopter, etc) or helicopter (see good starter plane options here). You can buy them ready to fly, including autopilot, here.
---2) An autopilot, such as APM 2.5 (see below)
---3) Optional: a useful “payload”, such as a digital camera or video transmission equipment
The DIY Drones community has created the world's first "universal autopilot", ArduPilot Mega (APM). It combines sophisticated IMU-based autopilot electronics with free Arduino-based autopilot software that can turn any RC vehicle into a fully-autonomous UAV.
A full setup consists of:
You can buy Ready-to-Fly UAVs (both planes and multicopters) from uDrones:

We'll be releasing an OSD board that works with APM in a month or so.
lost all my equiptment due to main battery loosing power .. which shut off the osd and gps .. leaving my cam powered but thanks to a osd not being able to use the second battery that the cam has .. makes me wonder what the heck!!!
sad over a grand lost 1.7 miles in front of me .. about to get the fpv helicopter but .. PRIVATE PROPERTY means PRIVATE .. so i loose .. they need a signal to always show the location no matter what
Comment by Tomas Soedergren on September 25, 2011 at 3:14pm Chris,
An upcoming APM compatible OSD - that´s just wonderful news!!
I´ll be looking for the "preorder" button :D

UAV DevBoard: Update: It's now better value than shown in the orignal post above 2.5 years ago. UDB4 Price is now $99.95 (UDB3 85$). The cheapest GPS from DIYDrones store is the MediaTek with adapter at $37.95. So for the new UDB4, the price is $109 less that shown in the original post above. (which is shown above at time of posting as $160 UDB + $60 GPS).
Comment by alex jack on November 24, 2011 at 12:13pm what are the dimension of Full ArduPilot Mega kit
Comment by Stepleader on December 3, 2011 at 10:09pm I second what Rahul Says..
Comment by cal cal on December 11, 2011 at 2:18am ok im am really new to this and just want a help with the what to buy side. i have a bixler plane and a dx6i tx so that side is sorted i want to mount a camera to the nose. most probley my conture hd which is 170grams and a 2200mah battery 200grams all i want is the ability to take a video of my property to fly down to each corner and make a box shape flight. i need to control alttitude direction and speed. can anyone give me an email of what they did for there one or what is the best way to go about this is.. thanks in advance
Comment by Nadim Wehrli blanco on January 11, 2012 at 2:10pm could yoy make a guide on how to assemble everything
UDB hardware significantly improved with v4 and now only $99.95!
Comment by LAURENT on February 7, 2012 at 3:07pm Amazing system
Season Two of the Trust Time Trial (T3) Contest has now begun. The fourth round is an accuracy round for multicopters, which requires contestants to fly a cube. The deadline is April 14th.86 members
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