diff --git a/src/data_flights.py b/src/data_flights.py
index 97433e8..fa3680f 100644
--- a/src/data_flights.py
+++ b/src/data_flights.py
@@ -1,4 +1,4 @@
-"""Flugverkehr-Collector: Globaler Snapshot via OpenSky Network API."""
+"""Flugverkehr: OpenSky (primary) + airplanes.live (fallback)."""
 import asyncio
 import logging
 import time
@@ -9,90 +9,109 @@ from fastapi import APIRouter
 logger = logging.getLogger("globe.flights")
 router = APIRouter()
 
-# OpenSky Network: Ein Call = alle Flugzeuge weltweit
-# Anonym: max 1 Call / 10 Sekunden, ~7000+ Flugzeuge
 _OPENSKY_URL = "https://opensky-network.org/api/states/all"
 
+# Fallback: airplanes.live Stuetzpunkte (wenige, wichtigste)
+_FALLBACK_GRID = [
+    (48, 10), (52, 13), (40, -4), (41, 12), (55, 10),  # Europa
+    (40, -74), (34, -118), (42, -88),                     # USA
+    (33, 36), (26, 56), (25, 45),                         # Nahost
+    (35, 140), (31, 121), (22, 114),                      # Asien
+]
+
 _cache: dict = {"data": None, "ts": 0}
 _lock = asyncio.Lock()
 _task = None
 
 
-async def _fetch_all():
-    """Holt alle Flugzeuge weltweit von OpenSky Network."""
-    now = time.time()
-    if _cache["data"] and now - _cache["ts"] < 14:
-        return _cache["data"]
-
-    async with _lock:
-        if _cache["data"] and time.time() - _cache["ts"] < 14:
-            return _cache["data"]
-
-        try:
-            async with httpx.AsyncClient(timeout=20) as client:
-                resp = await client.get(_OPENSKY_URL)
-                resp.raise_for_status()
-                raw = resp.json()
-        except Exception as e:
-            logger.warning(f"OpenSky Fehler: {e}")
-            return _cache["data"] or {"ac": [], "total": 0}
-
-        # OpenSky Format: states = [[icao24, callsign, origin, time_pos, last_contact, lon, lat, baro_alt, on_ground, velocity, heading, vert_rate, sensors, geo_alt, squawk, spi, pos_source], ...]
+async def _fetch_opensky(client):
+    """Versucht OpenSky — liefert alle Flugzeuge oder None bei Fehler."""
+    try:
+        resp = await client.get(_OPENSKY_URL)
+        if resp.status_code == 429:
+            logger.info("OpenSky: Rate-Limited (429), nutze Fallback")
+            return None
+        resp.raise_for_status()
+        raw = resp.json()
         states = raw.get("states", [])
         ac = []
         for s in states:
-            if not s or len(s) < 12:
+            if not s or len(s) < 12 or s[5] is None or s[6] is None:
                 continue
-            lon = s[5]
-            lat = s[6]
-            if lon is None or lat is None:
+            if s[8]:  # on_ground
                 continue
-            alt = s[7]  # baro altitude in meters
-            on_ground = s[8]
-            if on_ground:
-                continue  # Am Boden stehende Flugzeuge ausblenden
-            velocity = s[9]  # m/s
-            heading = s[10]
-            callsign = (s[1] or "").strip()
-            icao = s[0] or ""
-            origin = s[2] or ""
-
             ac.append({
-                "hex": icao,
-                "flight": callsign,
-                "lat": lat,
-                "lon": lon,
-                "alt_baro": round(alt * 3.281) if alt else None,  # m -> ft
-                "gs": round(velocity * 1.944) if velocity else None,  # m/s -> kts
-                "track": heading,
-                "origin": origin,
+                "hex": s[0] or "", "flight": (s[1] or "").strip(),
+                "lat": s[6], "lon": s[5],
+                "alt_baro": round(s[7] * 3.281) if s[7] else None,
+                "gs": round(s[9] * 1.944) if s[9] else None,
+                "track": s[10], "origin": s[2] or "",
             })
+        logger.info(f"OpenSky: {len(ac)} Flugzeuge")
+        return ac
+    except Exception as e:
+        logger.warning(f"OpenSky: {e}")
+        return None
+
+
+async def _fetch_fallback(client):
+    """Fallback: airplanes.live mit wenigen Stuetzpunkten."""
+    seen = {}
+    for lat, lon in _FALLBACK_GRID:
+        try:
+            resp = await client.get(f"https://api.airplanes.live/v2/point/{lat:.0f}/{lon:.0f}/250")
+            if resp.status_code == 200:
+                for a in resp.json().get("ac", []):
+                    h = a.get("hex")
+                    if h and h not in seen:
+                        seen[h] = a
+        except Exception:
+            pass
+        await asyncio.sleep(2)  # Langsam um Rate-Limits zu vermeiden
+    logger.info(f"airplanes.live Fallback: {len(seen)} Flugzeuge")
+    return list(seen.values())
+
+
+async def _fetch_all():
+    now = time.time()
+    if _cache["data"] and now - _cache["ts"] < 55:
+        return _cache["data"]
+
+    async with _lock:
+        if _cache["data"] and time.time() - _cache["ts"] < 55:
+            return _cache["data"]
+
+        async with httpx.AsyncClient(timeout=20) as client:
+            ac = await _fetch_opensky(client)
+            if ac is None:
+                ac = await _fetch_fallback(client)
+
+        if ac:
+            _cache["data"] = {"ac": ac, "total": len(ac)}
+            _cache["ts"] = time.time()
+        elif not _cache["data"]:
+            _cache["data"] = {"ac": [], "total": 0}
 
-        _cache["data"] = {"ac": ac, "total": len(ac)}
-        _cache["ts"] = time.time()
-        logger.info(f"Flights: {len(ac)} Flugzeuge (OpenSky)")
         return _cache["data"]
 
 
 async def _collector_loop():
-    """Background-Loop: Flugdaten alle 15s vorladen."""
-    await asyncio.sleep(3)
+    await asyncio.sleep(5)
     while True:
         try:
             await _fetch_all()
         except Exception as e:
-            logger.warning(f"Flight collector error: {e}")
-        await asyncio.sleep(15)
+            logger.warning(f"Flight collector: {e}")
+        await asyncio.sleep(60)
 
 
 def start_flight_collector():
     global _task
     if _task is None or _task.done():
         _task = asyncio.create_task(_collector_loop())
-        logger.info("Flight collector gestartet (OpenSky)")
+        logger.info("Flight collector gestartet (OpenSky + Fallback)")
 
 
 @router.get("/flights")
 async def get_flights():
-    data = await _fetch_all()
-    return data
+    return await _fetch_all()