Drones / UAV tools.
Build, fly and survey — flight time, thrust-to-weight, LiPo headroom, FPV link budgets and photogrammetry mission planning.
Realistic flight-time estimate for any multirotor — uses hover efficiency (g/W), pack voltage, ESC efficiency, usable-capacity derating and a flight-style multiplier instead of the naive mAh ÷ current formula.
Compute thrust-to-weight ratio and hover throttle for any multirotor using the correct square-law throttle ↔ thrust relationship — not the linear approximation most calculators get wrong. Recommends a motor thrust to hit a target TWR.
Compute theoretical and practical line-of-sight range for any FPV video or control link using the Friis equation. Accounts for TX power, antenna gains, receiver sensitivity, system losses and fade margin, plus 60% Fresnel zone clearance for long-range planning.
Verifies whether a LiPo pack can actually sustain your drone's continuous and burst current draw. Computes voltage sag from per-cell internal resistance and warns when manufacturer C-ratings are overstated.
Compute ground sample distance, ground footprint, flight-line spacing, trigger interval and motion-blur speed limit for drone mapping missions. Add an area and battery flight time to get total image count, flight lines, mission duration, battery swaps and SD card size.