RC link systems, VTX, antennas, protocols (ELRS, FrSky, CRSF), and RF fundamentals.
In-depth comparison of TBS Crossfire and ExpressLRS — range, latency, packet rates, hardware, cost, and which RC link is right for your build in 2026.
Everything you need to know about drone antennas — types, gain, polarization, frequency bands, and placement rules for FPV, RC links, and long-range builds.
Step-by-step guide to setting up ExpressLRS — flashing TX modules and RX, binding, Betaflight configuration, Lua script, and troubleshooting common issues.
How to calculate and design RF link budgets for long-range drones — Friis equation, EIRP, path loss, fade margin, frequency selection, and 50km+ system design examples.