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Tips / Porady
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DJI Return to Home: RTH altitude, Optimal or Preset, signal loss and the Home Point
It's easy to leave Return to Home on its defaults and never look at it again. It usually works. When it doesn't, the cause is often a setting chosen months ago or never checked: an RTH altitude below the tree line, a Home Point recorded in the wrong place, or a signal-lost action nobody remembers choosing.
Read articleMapping with a drone: GSD, overlap, flight height and ground control points
A drone map is not one photo from high up. It is a few dozen to a few hundred overlapping photos that software such as Pix4D, DroneDeploy or the free OpenDroneMap matches point by point and turns into an orthophoto, a surface model or a 3D mesh. If the photos are wrong, no processing setting will rescue the job, and Pix4D says it plainly: a bad acquisition plan leads to inaccurate results or a failed project, and you fly it again.
Read articleBetaflight filter settings: gyro and D-term lowpass, the dynamic notch and the filter sliders
Every filter in Betaflight trades noise for delay. Filter too little and the noise reaches the motors as heat, grinding and oscillation. Filter too much and the quad reacts late, which you feel as propwash wobble after flips and as a mushy, slightly floaty response. The Filter Settings section of the PID Tuning tab is where you choose that balance.
Read articleBetaflight, INAV or ArduPilot: choosing flight controller firmware for an FPV drone
Almost every FPV flight controller is designed with Betaflight in mind, and for most pilots that settles the question. It comes back when you build something Betaflight was not designed around: a long-range quad that should fly a route on its own, a wing, or a project that needs full autopilot features. That is when INAV and ArduPilot come up, and switching changes more than the name in the Configurator.
Read articleFPV goggles fit: IPD, focus, glasses and fogging
A sharp video feed is no use if the goggles show it to you blurred, doubled or behind a layer of fog. Most of that comes down to four things: the distance between your eyes (IPD), focus for your eyesight, what to do if you wear glasses, and the fan. Below is how each one works, with the actual ranges of current goggles and the steps from their manuals.
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