#aviation

Hot-air-balloon lift maths as an API, computed locally and deterministically — the thermal-lift, envelope-temperature and air-density numbers a balloon pilot, designer or physics teacher works a flight out with. The lift endpoint gives the buoyant lift from heating the air: gross lift = envelope volume × (outside air density − inside air density), the densities from the ideal-gas law — a 2,500 m³ envelope at 100 °C on a 15 °C day lifts about 698 kg gross, from which you subtract the envelope, basket, burner and fuel for the payload, and the hotter the air and colder the day the more it lifts. The required-temp endpoint inverts it: to carry a target lift the inside air must reach a particular density and so a particular temperature, with a check that it stays under the ~120 °C that nylon envelopes can take — the everyday pre-flight question of whether the balloon can lift today's crew and fuel. The air-density endpoint gives the moist-air density ρ = (P − 0.378·Pv) ÷ (R·T), and explains the counter-intuitive fact that humid air is LESS dense than dry air, slightly cutting the lift. Everything is computed locally and deterministically, so it is instant and private. Ideal for ballooning and aviation tools, STEM and physics-education apps, and buoyancy calculators. Pure local computation — no key, no third-party service, instant. Idealised dry-lift model. 3 compute endpoints. For Archimedes flotation in water use a buoyancy API; for party-balloon helium lift a balloon API.

api.oanor.com/hotairballoon-api

Aircraft fuel-planning maths as an API, computed locally and deterministically — the endurance, range and fuel-required numbers a pilot, dispatcher or flight-sim developer plans a flight with, all honouring a reserve. The endurance endpoint gives how long you can fly = usable fuel ÷ burn rate, holding back a reserve (30 min day / 45 min night VFR, 45 min IFR is typical), so the usable endurance is the time you can actually plan to rather than the tanks-dry figure — 50 gallons at 10 gph is 5:00 total but 4:15 usable on a 45-minute reserve. The range endpoint turns that into distance = usable endurance × ground speed, so it lives or dies on the wind: a headwind cuts the ground speed and the range while burning the same fuel per hour, which is why you plan on the forecast ground speed, not the true airspeed. The fuel-required endpoint sizes the load for a leg = trip time × burn plus the reserve — 300 nm at 120 kt and 10 gph needs 25 gallons of trip fuel plus 7.5 reserve, 32.5 total — to which a real flight adds taxi and climb allowances. Everything is computed locally and deterministically, so it is instant and private. Ideal for flight-planning and EFB apps, dispatch and flight-school tools, flight-simulator utilities, and general-aviation calculators. Pure local computation — no key, no third-party service, instant. Add taxi/climb and a personal margin; confirm against tank capacity and weight-and-balance. 3 compute endpoints. For glide range use a glide-ratio API; for density altitude a density-altitude API.

api.oanor.com/fuelburn-api

Aircraft glide-performance maths as an API, computed locally and deterministically — the glide-distance, glide-ratio and reachability numbers a pilot, flight-instructor or flight-sim developer works an engine-out or soaring problem with. The glide-distance endpoint gives the still-air distance you can cover = height above the ground × the glide ratio (L/D): from 5,000 ft at a 9:1 ratio you reach about 45,000 ft, ~7.4 nm, with the answer in feet, nautical miles and kilometres. The glide-ratio endpoint reads the slope straight off the polar — glide ratio = forward speed ÷ sink rate (1 knot ≈ 101.27 ft/min), so 60 kt at a 600 ft/min sink is about 10:1, a 5.6° glide path — and gliders reach 40–60:1, a light single ~9:1, an airliner ~17:1. The reach endpoint answers the practical question: the height needed to reach a field = distance ÷ glide ratio, the arrival height is what is left, and it only counts as making it if that clears a safety reserve (default 1,000 ft) for the circuit and approach. Everything is computed locally and deterministically, so it is instant and private. Ideal for flight-planning and EFB apps, gliding and soaring tools, flight-simulator and training utilities, and aviation-safety calculators. Pure local computation — no key, no third-party service, instant. Still-air estimates — adjust for wind, configuration and a margin. 3 compute endpoints. For density altitude use a density-altitude API; for runway wind components a crosswind API.

api.oanor.com/glideratio-api

Aviation atmosphere maths as an API, computed locally and deterministically using the exact International Standard Atmosphere relations — the numbers a pilot, dispatcher or flight-planning tool needs before take-off, not a rough rule of thumb. The density-altitude endpoint turns the field elevation, altimeter setting and outside air temperature into the pressure altitude (elevation + (29.92 − setting) × 1000) and then the density altitude — the altitude the air actually feels like to the wings and engine — computed from the true ISA density ratio rather than the approximate 120-foot-per-degree rule, with the ISA temperature deviation: on a hot, high day the density altitude soars, robbing lift and thrust and lengthening the take-off roll, the classic mountain-airport hazard. The true-airspeed endpoint gives TAS from calibrated airspeed as CAS ÷ √(density ratio), so the navigator gets the real speed through the air that climbs above the indicated reading with altitude and temperature. The isa endpoint returns the standard-atmosphere temperature, pressure, pressure and density ratios and the speed of sound at any altitude in the troposphere — the reference every altimeter, performance chart and engine rating is built on. Everything is computed locally and deterministically, so it is instant and private. Ideal for flight-planning and EFB apps, drone and UAV tools, aviation weather dashboards, and aerospace-engineering utilities. Pure local computation — no key, no third-party service, instant. Troposphere (≤ 36,089 ft); incompressible TAS. 3 compute endpoints. For the speed of sound and Mach use a Mach-number API; for runway wind components a crosswind API.

api.oanor.com/densityaltitude-api

Matemáticas de componentes de viento en pista de aviación como una API, calculadas local y determinísticamente. El endpoint de componentes descompone el viento superficial en las dos partes que importan a los pilotos para el despegue y aterrizaje: el componente de viento cruzado perpendicular a la pista, viento·sin(θ), y el componente de viento de frente (o de cola) a lo largo de ella, viento·cos(θ), donde θ es el ángulo entre la dirección del viento y el rumbo de la pista — proporcione la pista como un rumbo o un designador del 01 al 36, más la dirección y velocidad del viento, y devuelve el viento cruzado con el lado desde el que sopla (izquierda o derecha), el viento de frente o de cola, y el ángulo de desviación; viento 30° fuera del morro a 20 nudos es un viento cruzado de 10 nudos y un viento de frente de 17,3 nudos. El endpoint de viento máximo lo invierte: la mayor velocidad total del viento antes de que se exceda un límite de viento cruzado dado en un ángulo de viento, límite / |sin θ|. Las direcciones están en grados (el viento es de DONDE VIENE) y la unidad de velocidad es la que usted proporcione (nudos, m/s). Todo se calcula local y determinísticamente, por lo que es instantáneo y privado. Ideal para desarrolladores de aplicaciones de aviación, pilotos, entrenamiento de vuelo, bolsa de vuelo electrónica, drones y aplicaciones de información meteorológica, herramientas de selección de pista y límite de viento cruzado, y software de cabina. Cálculo puramente local — sin clave, sin servicio de terceros, instantáneo. En vivo, nada almacenado. 2 endpoints. Esto es geometría de viento en pista; para la velocidad del sonido y el número Mach use una API de Mach y para la densidad de la atmósfera estándar una API de atmósfera estándar.

api.oanor.com/crosswind-api

International Standard Atmosphere (ISA) maths as an API, computed locally and deterministically. The properties endpoint gives the air temperature, pressure, density and speed of sound at any altitude from sea level to 20 km — using the standard troposphere lapse rate (T = T0 − 0.0065·h) and the isothermal lower stratosphere above 11 km — along with the density, pressure and temperature ratios relative to sea level. The density-altitude endpoint computes the density altitude — the ISA altitude with the same air density — from a pressure altitude and the actual outside-air temperature, the figure pilots use because heat and low pressure rob an aircraft of lift, engine power and propeller thrust; it also reports the ISA temperature deviation. The pressure-altitude endpoint turns a barometric reading (in hectopascals or pascals) into the pressure altitude, the ISA altitude at which the standard pressure equals your reading. Altitudes accept metres or feet, temperature °C or kelvin. Everything is computed locally and deterministically, so it is instant and private. Ideal for aviation, drone, ballooning, HVAC and meteorology app developers, flight-planning and performance tools, and physics education. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is the ISA atmospheric model; for the acoustic and relativistic Doppler effect use a Doppler API.

api.oanor.com/atmosphere-api

VATSIM, la Red de Simulación de Tráfico Aéreo Virtual, como API — la red de simulación de vuelo en línea más grande, donde decenas de miles de pilotos virtuales y controladores de tráfico aéreo vuelan y controlan en tiempo real en simuladores de vuelo. Esta API expone el feed en vivo de la red VATSIM. /v1/pilots devuelve los pilotos actualmente volando en línea, cada uno con su posición en vivo (latitud, longitud, altitud, velocidad respecto al suelo, rumbo), transpondedor, tipo de aeronave y plan de vuelo presentado (salida, llegada, ruta, altitud de crucero, reglas de vuelo); filtrar por aeropuerto (coincidiendo con el OACI de salida o llegada, ej. airport=EGLL) o por prefijo de indicativo. /v1/controllers devuelve los controladores de tráfico aéreo actualmente en línea, cada uno con indicativo, frecuencia de radio, instalación (Entrega, Tierra, Torre, Aproximación/Salida, Centro), calificación y hora de inicio de sesión; filtrar por prefijo de aeropuerto (ej. airport=KLAX coincide con KLAX_TWR, KLAX_APP), con una opción observers=true. /v1/stats devuelve el estado de la red — total de clientes conectados y el número de pilotos, controladores y posiciones ATIS en línea, con la marca de tiempo de la instantánea. La instantánea de la red se actualiza aproximadamente cada 15 segundos. Ideal para herramientas de simulación de vuelo, mapas de ATC en vivo y tráfico, paneles de eventos y personal, y bots comunitarios. Datos de VATSIM (gratuito para usar; por favor, acredite a VATSIM). Esta es la red de simulación de vuelo virtual en vivo — distinta del seguimiento de vuelos ADS-B del mundo real.

api.oanor.com/vatsim-api

Live air traffic as an API, powered by the OpenSky Network — a community network of thousands of volunteer ADS-B/Mode-S receivers tracking aircraft worldwide in real time. This is live flight tracking, the FlightRadar-style picture of what is in the sky right now, distinct from static aircraft registries, airline directories, airport metadata and scheduled-flight status. /v1/flights returns every aircraft currently airborne inside a geographic bounding box (give the box as lamin/lomin/lamax/lomax in degrees, kept under roughly 20° latitude by 30° longitude), each with its ICAO 24-bit address, callsign, origin country, live longitude and latitude, barometric and geometric altitude, ground speed, true heading, vertical rate and transponder squawk — a real-time radar snapshot with the network timestamp. /v1/aircraft looks up a single aircraft by its 6-hex ICAO 24-bit address and returns its current live state (or airborne:false when it is grounded or out of receiver range). /v1/arrivals and /v1/departures list the flights that arrived at or departed from an airport (4-letter ICAO code such as EDDF Frankfurt or EGLL Heathrow) over the last N hours (1-48), each with callsign, the estimated airport at the other end and the first/last-seen timestamps. Ideal for live flight-tracking maps, aviation dashboards, geofencing and proximity alerts, spotting tools, and research into air-traffic patterns. Positions are in degrees, altitudes in metres and speeds in metres per second. Data from the OpenSky Network, free for non-commercial use — please credit OpenSky. Coverage depends on volunteer receiver density.

api.oanor.com/opensky-api

Airport radio communication frequencies as an API — 30,000+ frequencies at 11,000+ airports, from the OurAirports dataset. List every published frequency at an airport by ident (e.g. KJFK → Approach 125.7/127.4/132.4, ATIS, Tower, Ground, Clearance, …), or filter fleet-wide by type or exact frequency (e.g. find every airport using the emergency frequency 121.5). Each record carries the airport, frequency type (TWR, GND, ATIS, APP, CTAF, UNICOM, CNTR, …) with a readable name, the description and the frequency in MHz. Ideal for aviation radio, flight simulators, EFB, scanner and flight-planning apps.

api.oanor.com/airportfreq-api

Every runway in the world as an API — 47,000+ runways at 40,000+ airports, from the OurAirports dataset. List all the runways at any airport by ICAO/local ident (e.g. KJFK → four runways, the longest 13R/31L at 14,511 ft), with each runway's length (feet and metres), width, surface (asphalt, concrete, grass, …), lighting and both-end designators, true headings and coordinates. Or filter runways fleet-wide by surface, minimum length and lighting. Ideal for flight planning, flight simulators, EFB and aeronautical apps, and aviation analytics.

api.oanor.com/runways-api

Radio navigation aids (navaids) as an API — 11,000+ VOR, NDB, DME, TACAN, VORTAC and VOR-DME beacons across 231 countries, from the OurAirports dataset. Look up a navaid by its ident (e.g. JFK → Kennedy VOR-DME 115.9 MHz), search by name/ident with country and type filters, or find all navaids within a radius of any coordinate. Each record carries the ident, name, type, frequency (kHz and MHz), elevation, country and any associated airport. Ideal for aviation tools, flight simulators, EFB apps, flight planning and aeronautical charts.

api.oanor.com/navaids-api

Clima de aviación en vivo para cualquier aeropuerto como API, retransmitido desde el Centro Meteorológico de Aviación de la NOAA. Obtenga la observación METAR actual para una estación OACI (p. ej., KJFK → Nueva York JFK: temperatura, punto de rocío, viento, visibilidad, altímetro, capas de nubes, categoría de vuelo VFR/MVFR/IFR/LIFR y el informe sin procesar) o el pronóstico de aeródromo terminal TAF. Consulte una estación o hasta 10 a la vez (KJFK,EGLL,EDDF). Se devuelven tanto los campos decodificados como el texto sin procesar. Ideal para herramientas de planificación de vuelos, paneles de aviación, operaciones de drones/UAV y aplicaciones meteorológicas.

api.oanor.com/metar-api

Resolve and search aircraft type designators — turn the IATA (e.g. 738) and ICAO (e.g. B738) aircraft codes returned by flight-data APIs into readable model names like "Boeing 737-800". Look up by IATA code, ICAO code or name, search 240+ aircraft types, or fetch the whole list. Bundled, fast and always available — a handy companion to flight, airline and airport data.

api.oanor.com/aircraft-api

Search a database of 6,000+ airlines worldwide (OpenFlights open dataset). Find carriers by name and country, look one up by its IATA (2-letter) or ICAO (3-letter) code, and browse counts per country. Each record includes the airline name, codes, radio callsign, country and active status — ideal for travel apps, booking flows, flight dashboards and aviation tooling.

api.oanor.com/airlines-api

Posiciones de aeronaves en tiempo real a partir de datos ADS-B en vivo (OpenSky Network). Consulta todas las aeronaves dentro de un cuadro delimitador geográfico o rastrea una sola aeronave por su dirección de transpondedor ICAO24: devuelve posición, altitud barométrica y geométrica, velocidad respecto al suelo, rumbo, velocidad vertical, código squawk y país de registro. Ideal para mapas en vivo, paneles de vuelo y alertas de proximidad.

api.oanor.com/flights-api

A worldwide airport database in one fast API: roughly 7,700 airports with IATA and ICAO codes, name, city, country, latitude and longitude, altitude and time zone. Look up any airport by its IATA (3-letter) or ICAO (4-letter) code, search by name, city or country, find the airports nearest to any coordinate within a radius (with great-circle distances, optionally only those with IATA codes), or list every airport in a country. Built on the open OpenFlights/OurAirports dataset and served entirely in-memory, so responses are instant and the service is always available. Ideal for travel and booking apps, flight trackers, logistics and routing, maps and location features.

api.oanor.com/airports-api