diff --git a/ogn/model/aircraft_beacon.py b/ogn/model/aircraft_beacon.py
index 5894995..ef578c2 100644
--- a/ogn/model/aircraft_beacon.py
+++ b/ogn/model/aircraft_beacon.py
@@ -52,17 +52,6 @@ class AircraftBeacon(Beacon):
     Index('ix_aircraft_beacon_receiver_id_receiver_name', 'receiver_id', 'receiver_name')
     Index('ix_aircraft_beacon_device_id_address', 'device_id', 'address')
 
-    def __init__(self, receiver_name, address, timestamp, aircraft_type, stealth, error_count, software_version, hardware_version, real_address):
-        self.receiver_name
-        self.address = address
-        self.timestamp = timestamp
-        self.aircraft_type = aircraft_type
-        self.stealth = stealth
-        self.error_count = error_count
-        self.software_version = software_version
-        self.hardware_version = hardware_version
-        self.real_address = real_address
-
     def __repr__(self):
         return "<AircraftBeacon %s: %s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s>" % (
             self.address_type,
diff --git a/ogn/model/airport.py b/ogn/model/airport.py
index 825f761..bd5ebe0 100644
--- a/ogn/model/airport.py
+++ b/ogn/model/airport.py
@@ -25,9 +25,6 @@ class Airport(Base):
     # Relations
     takeoff_landings = relationship('TakeoffLanding')
 
-    def __init__(self, name):
-        self.name = name
-
     def __repr__(self):
         return "<Airport %s: %s,%s,%s,%s,%s,%s,%s,%s,%s,% s>" % (
             self.name,
diff --git a/ogn/model/device.py b/ogn/model/device.py
index 797e5e0..8bbe02b 100644
--- a/ogn/model/device.py
+++ b/ogn/model/device.py
@@ -20,9 +20,6 @@ class Device(Base):
     # Relations
     aircraft_beacons = relationship('AircraftBeacon')
 
-    def __init__(self, address):
-        self.address = address
-
     def __repr__(self):
         return "<Device: %s,%s,%s,%s,%s,%s>" % (
             self.address,
diff --git a/ogn/model/receiver_beacon.py b/ogn/model/receiver_beacon.py
index d271344..f9a51e2 100644
--- a/ogn/model/receiver_beacon.py
+++ b/ogn/model/receiver_beacon.py
@@ -40,13 +40,6 @@ class ReceiverBeacon(Beacon):
     # Multi-column indices
     Index('ix_receiver_beacon_receiver_id_name', 'receiver_id', 'name')
 
-    def __init__(self, name, timestamp, altitude, version, platform):
-        self.name = name
-        self.timestamp = timestamp
-        self.altitude = altitude
-        self.version = version
-        self.platform = platform
-
     def __repr__(self):
         return "<ReceiverBeacon %s: %s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s>" % (
             self.version,
diff --git a/ogn/model/takeoff_landing.py b/ogn/model/takeoff_landing.py
index bdf9adb..2b0d595 100644
--- a/ogn/model/takeoff_landing.py
+++ b/ogn/model/takeoff_landing.py
@@ -19,9 +19,3 @@ class TakeoffLanding(Base):
 
     device_id = Column(Integer, ForeignKey('device.id', ondelete='SET NULL'), index=True)
     device = relationship('Device', foreign_keys=[device_id])
-
-    def __init__(self, is_takeoff, timestamp, airport_id, device_id):
-        self.is_takeoff = is_takeoff
-        self.timestamp = timestamp
-        self.airport_id = airport_id
-        self.device_id = device_id