back" during turns to prevent altitude loss and speed increase. Costs range from 20 to US$40. Crashes are common and inconsequential. Throttle control and turning reversal (when flying toward the pilot) rapidly become second-nature, giving a significant advantage when learning to fly a more costly hobby class RC aircraft. Video piloting (first-person view or FPV) First-person view (FPV) flight is a type of remote-control flying and a distinguishing feature of a drone. It involves mounting a small video camera and television transmitter on an RC aircraft and flying by means of a live video down-link, commonly displayed on video goggles or a portable LCD screen. When flying FPV, the pilot sees from the aircraft's perspective, and does not even have to look at the model. As a result, FPV aircraft can be flown well beyond visual range, limited only by the range of the remote control, video transmitter and endurance of the aircraft. Video transmitters typically operate at a power level between 200 mW and 2500 mW. The most common frequencies used for video transmission are 900 MHz, 1.2 GHz, 2.4 GHz, and 5.8 GHz. Specialized long-range UHF control systems operating at 433 MHz (for amateur radio licensees only) or 869 MHz are commonly used to achieve greater control range, while the use of directional, high-gain antennas increases video range. Sophisticated setups are capable of achieving a range of 20–30 miles or more. FPV aircraft are frequently used for aerial photography and videography, and many videos of FPV flights can be found on video sites such as YouTube and Vimeo. A basic FPV system consists of a camera, video transmitter, video receiver, and a display. More advanced setups commonly add a flight controller, including on-screen display (OSD), auto-stabilize and return-to-home (RTL) functions. RTL function is usually applied with failsafe in order to allow the aircraft to fly back to the home point on its own in when signal lost. Some advanced controllers can also navigate the drone using GPS. On-board cameras can be equipped with a pan and tilt mount, which when coupled with video goggles and "head tracking" devices creates a first-person experience, as if the pilot was actually sitting in the cockpit of the RC aircraft. Both helicopter, multiple rotors and fixed-wing RC aircraft are used for FPV flight. The most commonly chosen airframes for FPV planes are models with sufficient payload space for larger battery and large