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.
Read articleOnce you can fly a clean line in acro, the next question is what to do with it. Most freestyle builds on three movements: rotating on the roll axis, rotating on the pitch axis and spinning on yaw. Rotor Riot's tricktionary describes nearly every named trick as a combination or variant of those three. This guide covers the four tricks most pilots learn first, in the order that tends to work: the roll, the flip, the split-S and the power loop.
Read articleCamera mounts, antenna holders and GoPro mounts on an FPV drone are usually printed plastic, and they take the hits in a crash. With your own printer, a broken mount costs a few grams of filament instead of a parcel from a shop. The usual material is TPU, a flexible filament that bends where PLA would snap. It is also much fussier to print than PLA: Prusa calls flexible filaments suitable mostly for advanced users and lists nozzle clogs, filament tangling in the extruder gears and stringing among the problems.
Read articleA drone can report an RTK-fixed position for every photograph and still produce an elevation model that fails an independent survey check. The position solution constrains where the camera was, within the uncertainty of the observation and its timing. Photogrammetry must also infer lens geometry, camera orientation and the position of each reconstructed surface point. Those are different estimation problems.
Read articleThe video system is the hardest part of an FPV setup to change later. Goggles are usually the biggest single expense, and the systems mostly do not talk to each other: DJI goggles show only DJI video, a Walksnail camera needs Walksnail goggles, and so on. Pick one and every new drone you build gets the matching camera and transmitter.
Read articleA hyperlapse is a timelapse shot from a moving drone. The aircraft takes a photo at a fixed interval while it flies, and DJI Fly stitches the photos into a short video when the shot ends. On the DJI Mini 4 Pro, the drone this article uses as its reference, there are four modes: Free, Circle, Course Lock and Waypoint. The Mini 3 Pro has the same four. On other drones, check the manual for which modes and limits apply.
Read articleOut of the box the DJI Avata 2 flies like a camera drone with goggles: it holds position, brakes when you let go of the sticks and levels itself. Manual mode removes all of that and turns it into a regular acro FPV drone. DJI describes it as the classic FPV control mode with the highest maneuverability, in which all flight assistance, including precise hovering and auto-brake, is switched off.
Read articleMost radios come out of the box with the sticks set up for general RC use, not for FPV. A few screws, a calibration run and some thought about how you hold the sticks can make the drone easier to hover and to fly precisely. None of it costs money, and everything can be undone.
Read articleA survey mission may show six points on a map while the flight controller holds many more commands. Camera triggers, speed changes and landing-pattern instructions can sit between the navigation points. For operators this is usually a convenience: the ground station combines related actions into one editable visual item. For software deciding whether a mission can be continued, however, the distinction can become a correctness problem.
Read articleBLHeli 32 shut down in June 2024, and AM32, an open-source firmware for 32-bit ESCs, has taken its place. Betaflight's own ESC firmware page now recommends it for 32-bit ESCs, and it supports bidirectional DShot for RPM filtering and EDT (extended DShot telemetry). The first time you open the AM32 configurator, though, you get a wall of switches and sliders with names like "Complementary PWM", "Stall protection" and "Sine Mode Power". Some of them matter on a quad. Several are meant for RC cars and crawlers and only get in the way on a quad.
Read articleBetaflight 2025.12 added two modes that DJI pilots take for granted: Altitude Hold, which keeps the quad at a fixed height, and Position Hold, which also keeps it over one spot. Flip a switch and the quad levels out and hovers while you check your bearings, untangle a goggle strap or wait for a car to pass. Oscar Liang compares it to the panic button on the DJI Avata 2.
Read articleYou charge all your DJI batteries on Wednesday for a weekend shoot, and on Saturday morning the app shows 96% instead of 100%. Leave them another week and they sit at 60%. The batteries may also feel warm in the bag even though nothing is connected. None of this is a fault. DJI Intelligent Flight Batteries discharge themselves on purpose when they are left full, and the timing depends on the model.
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