Notes

Quick reference for EdgeTX (and OpenTX) users on the RadioMaster TX16S: getting control-link geometry right at the servo arm and slowing down servo travel for scale or smooth control. Control Link Geometry The angle between the servo arm and the control rod has a huge effect on how linear (and how strong) the surface response is. Get it wrong and you end up with binding, lost throw, or unwanted differential. This short demo walks through the geometry visually: Control link geometry demo (YouTube) Slowing Down Servo Travel For scale models, retracts, flaps or just smoother flying, you can apply a delay or a slow rate to a servo channel directly in OpenTX/EdgeTX — no extra hardware needed. Step-by-step using mixer "Delay" and "Slow": OpenTX/EdgeTX — How to Delay and Slow Servo Travel (YouTube) Where to Configure Delay (s) — wait N seconds before the servo starts moving after a switch change. Slow Up / Slow Down (s) — limit how fast the servo can...

Notes on building Eclipson's 3D-printable Göppingen Gö 1 Wolf — a free vintage glider model — including the filament I used and the printing guide reference. About the Model The Gö 1 Wolf is a 1935 German training glider, available as a free 3D-printable RC model from Eclipson Airplanes: Gö 1 Wolf — Eclipson Airplanes (free download) I printed this one for a friend. Filament The recipe Eclipson recommends — and what I used: LW-PLA (lightweight, foaming PLA) for the wing and fuselage shells. Order example: PolyLight 1.0 LW-PLA Natural 1 kg (3DLabPrint, Amazon DE) Standard PLA for the structural and hardware-mount parts. Tip: LW-PLA must be dry — bake or dehydrate it before printing or you'll get poor foaming and weak parts. Printing Guide Eclipson's official printing details PDF (settings, foaming temperatures, infill, walls): Gö 1 Wolf — Printing Details (PDF) Build Photos

To fly drones or other unmanned aircraft (UAS) legally in Portugal, you need to register as an operator with ANAC, mark the aircraft, hold the right pilot competency, and get airspace authorization for camera/imagery flights. This is the current setup as of 2026. What changed: ANAC now runs everything through one unified platform — uas.anac.pt ("Voe na Boa") — covering operator registration (REPIF/TRACE), pilot training, aircraft registration and EASA airspace authorizations. The old separate AAN flow is now integrated. Step 1 — Register as an operator (ANAC) Go to uas.anac.pt → Register . Complete operator registration. You receive an operator number (REPIF/TRACE) — this is the EU-wide ID that must be displayed on every drone you fly. Mark the aircraft with that number (printed sticker, engraved, written — any visible permanent marking is fine). Flying without it can carry a fine of up to €2,000. Step 2 — Get your pilot competency Under the EASA Ope...

My current 3D printing setup for RC and hobby projects: which printer I run, which filaments I trust, and why filament dryness is the single biggest factor in print quality. Printer I'm running a Prusa MK4 and very happy with it. Previous printers I owned/built: Prusa MK3S+, Ender V3, plus several DIY builds. The MK4 is the one I keep coming back to for hobby work — reliable input shaping, easy Y-axis calibration, and good first-layer with the Nextruder. (Note: as of 2026, Prusa also offers the MK4S as a drop-in upgrade with the high-flow Nextruder; worth considering if you're buying new.) Filament Storage & Drying — The #1 Tip Removing humidity from filament makes a tremendous difference: cleaner surfaces, no popping, better layer adhesion. This is true for all filaments but critical for hygroscopic ones (LW-PLA, TPU, PETG, Nylon). I dry with the EIBOS Easdry / Series X dryer (ships from Europe). I store unused spools in EIBOS vacuum bags with desiccant...

How I bring up a new INAV-based fixed-wing build: choosing the flight controller, installing the configurator, flashing the board over DFU, and starting from a clean slate. Current versions (2026): INAV firmware 9.0.x ("Gallant Goshawk" generation) with INAV Configurator 9.0.x . Configurator and firmware versions must match the major version — don't connect a 9.x configurator to an 8.x board (or vice versa). 1. Choose a Compatible Flight Controller I default to Matek Systems boards — they're well-supported in INAV, have clean documentation, and the H7-class boards (H743 family) give plenty of headroom for the new INAV 9 features. Browse boards: mateksys.com · Full INAV-supported board list: INAV wiki — Boards 2. Install INAV Configurator Get the latest stable Configurator that matches the firmware you plan to flash: INAV Configurator — GitHub releases Windows 64-bit → win64 macOS Apple Silicon → MacOS_arm64 macOS Intel → MacOS_x64 Linux →...

How to get the full INAV OSD overlay (battery, GPS, artificial horizon, warnings) on the original DJI HD FPV Goggles V2 with a Caddx Vista air unit, by rooting both devices with WTFOS. Scope & status: WTFOS works for the original DJI HD FPV Goggles V2 + DJI/Caddx Vista Air Unit (the older 2.4 GHz / 5.8 GHz HD system). It does not apply to the newer DJI O3 / O4 Air Units or to Goggles 2 / Goggles 3 / Goggles N3 — those have a native MSP DisplayPort path. The WTFOS project is community-driven ( fpv.wtf , currently v2.3.0) and you root your own gear at your own risk. What You're Doing Rooting the goggles + Vista with the margerine exploit. Installing WTFOS (a community OS-on-top) on both. Telling INAV to send its native OSD via MSP to the air unit, which WTFOS overlays on the analog video feed. Reference Build Video Walkthrough of the result: INAV OSD over DJI HD (YouTube) Steps Wire MSP to the Vista. Check your flight-controller manufa...