This directory brings together the UAS engineering calculator workspace and specialist assessment assistants. Use calculators for explicit numerical models and assistants to organise an assessment for review.
Planning aid, not operational approval. These tools are provided for UAS engineering planning, training, early-stage design and trade-study purposes only. Verify outputs against official weather, manufacturer data, approved procedures, test evidence and regulation.
All 18 calculators and their deeper explanations are free. Open the workspace, or choose an individual tool below.
These calculators remain staging beta planning tools. Each calculator page lists its assumptions, limitations and review status; user acceptance and cross-browser checks remain pending.
Choose a calculator
Navigation and survey
- WGS84 coordinate converter — decimal degrees, DMS, DDM and UTM.
- Distance, bearing and destination — route geometry and waypoint estimates.
- Survey flight lines and batteries — line spacing, track distance and time estimates.
Weather and environment
- METAR decoder and weather risk tags — common weather groups and entered planning thresholds.
- Wind components — headwind, tailwind, crosswind and gust components.
- Air density and density altitude — pressure, temperature and elevation effects.
Energy and endurance
- Battery pack builder — cell configuration, voltage, capacity and energy.
- Battery runtime — load current and usable battery energy.
- Electric UAS flight endurance — propulsion, auxiliary load and reserve.
- UAS fuel usage and endurance — fuel flow, available fuel and reserve.
Loading and power
- Payload and MTOW budget — available payload and take-off mass margin.
- Centre of gravity and moments — component mass, position and entered limits.
- Electrical power budget — component loads and available power.
- Size, weight and power budget — integration budgets and remaining margins.
RF and networking
- RF link budget — received power, losses and link margin.
- First Fresnel zone — path clearance geometry.
- Radio horizon — antenna heights and geometric horizon.
- IPv4 subnet calculator — network, host range and address planning.
Learn and troubleshoot
- RF Fundamentals course — explanations, worked examples and practice.
- RF engineering lesson library — models, sources and field checks.
- Linux and RF faultfinding roadmaps — symptoms, checks and recovery verification.
- Practical guides and manuals — setup, build and troubleshooting guidance.
Specialist assistants
These assistants help organise an assessment for review. Read their limitations before opening them in ChatGPT; they do not provide operational approval.
- Integration Assessment Architect: scope and limitations — interfaces, evidence, testing and acceptance.
- Drone Risk Assessment Assistant UK: scope and limitations — assumptions, evidence gaps and risk-assessment review.