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Britten-Norman Defender

Reconnaissance / Transport / Patrol Aircraft

Britten-Norman Defender

Reconnaissance / Transport / Patrol Aircraft


The Britten-Norman Defender was developed from the similar Britten-Norman Islander transport aircraft.
National Flag Graphic
ORIGIN: United Kingdom
YEAR: 1989
STATUS: Active, In-Service
MANUFACTURER(S): Britten-Norman - UK
OPERATORS: Denmark; Ireland; Mauritius; Morocco; Pakistan; Philippines; United Kingdom; United States

Unless otherwise noted the presented statistics below pertain to the Britten-Norman BN2T-4S Defender 4000 model. Common measurements, and their respective conversions, are shown when possible.
CREW: 2 + 6
LENGTH: 35.86 feet (10.93 meters)
WIDTH: 48.98 feet (14.93 meters)
HEIGHT: 13.78 feet (4.2 meters)
WEIGHT (EMPTY): 4,998 pounds (2,267 kilograms)
WEIGHT (MTOW): 8,499 pounds (3,855 kilograms)
ENGINE: 2 x Allison 250-B17F turboprop engines.
SPEED (MAX): 225 miles-per-hour (362 kilometers-per-hour; 195 knots)
RANGE: 437 miles (703 kilometers; 380 nautical miles)

Mission-specific but can include a combination of the following across four underwing hardpoints:

Conventional Drop Bombs
Air-to-Surface Missiles
7.62mm Machine Gun Pods
Rocket Pods
Reconnaissance Pods and Equipment
2,500lbs in External Fuel Tanks
Graphical image of an aircraft air-to-surface missile
Graphical image of an aircraft rocket pod
Graphical image of an aircraft conventional drop bomb munition
Graphical image of an aircraft external fuel tank

Series Model Variants
• BN2T "Defender" - Base Utility Transport Variant
• BN2T-4S "Defender 4000" - Surveillance Platform; enlarged wing area and nose assembly; FLIR; GPS; increased weights.
• BN2T "Maritime Defender" - Maritime Patrol and General Reconnaissance Platform.
• Defender AL1 - British Army Designation


Detailing the development and operational history of the Britten-Norman Defender Reconnaissance / Transport / Patrol Aircraft.  Entry last updated on 8/8/2018. Authored by Staff Writer. Content ©
The Britten-Norman Defender is a militarized version of the successful Britten-Norman Islander twin turboprop-powered aircraft. The Islander originated in the 1960s and became a global entity, seeing over 1,200 examples produced and delivered by the end of her tenure. Within these orders, the type proved versatile enough to handle a wide range of sortie requirements that only served to strengthen her legacy as a durable Short Take-Off and Landing (STOL) airframe. Following financial difficulties, Britten-Islander was bought by a pair of Omani business men (brothers in the Zawawi family) and formed into B-N Group. Both the Islander and the Defender continue to be marketed today under various product faces to enhance her reach. The Islander/Defender replaced the Beaver in the British Army inventory and is only one of two types of fixed-wing aircraft currently in service with the Army Air Corps.

The Defender has since served in a variety of roles including that of counter-insurgency (extensively so during Northern Ireland operations), reconnaissance, surveillance and utility light transport. Among other sortie types in the Defender's forte became light attack and forward air control (FAC) when necessary. The Defender has proven a capable and robust platform since her inception into service leading to the "Maritime Defender" - a designation covering the armed maritime version of the base Defender multi-role utility transport. The Defender was officially added to the ranks of the British Army on March 10th, 1989.

Design is wholly utilitarian and is most characteristically defined by the high-mounted monoplane wings. Each wing maintains an Allison 250-B17F turboprop engine powering a three-bladed propeller. The cockpit compartment is held well forward in the squared off fuselage with slab sides and features a useful sloped nose for improved downward visibility. The undercarriage is a conventional tricycle arrangement and made up of two double-tired main landing gear legs and a single-tired nose landing gear leg - as a whole, the undercarriage is non-retractable. The empennage is dominated by a single large-area vertical tail fin clipped at the top and sporting some sweep along the leading edge. Horizontal tailplanes are affixed to the vertical fin tail. Typical accommodations are for two pilots and up to six passengers. Entry/exit is via side doors, two forward and two aft. Her gross weight is listed at 7,000lbs. Each wing can field four hardpoints for various munition options to include gun pods, rocket pods and bombs if need be or external fuel tanks for extended loitering times and operational range. Specialized reconnaissance and surveillance mounts are fitted with applicable tailored equipment, cameras and jamming pods as well as a bevy communications options. Airborne Early Warning (AEW) Defenders sport a hideous-looking nose radome that quickly identifies the type and its role.

In 2003, the UK military purchased three (some sources state four) Defenders to help with the deteriorating conditions in Iraq following the 2003 coalition invasion. These aircraft carried the designation of Defender 4S AL Mk 1 and sported underwing dispensers to protect against surface-to-air guided munitions. This model was furthered defined by the implementation of an electro-optical turret under the extreme end of the nose.

The Defender 4000 is the current military version of the Defender series and first flight of this system was achieved in August of 1994. The Defender 4000 features a larger wing component similar to that of the Trislander and operates with increased weight tolerances. Her engines are more powerful than previous versions and she sports an enlarged nose section for the fitting of search radar. Top speed is a reported 225 miles per hour.


Our Data Modules allow for quick visual reference when comparing a single entry against contemporary designs. Areas covered include general ratings, speed assessments, and relative ranges based on distances between major cities.

Image of collection of graph types

Relative Maximum Speed Rating
Hi: 300mph
Lo: 150mph
    This entry's maximum listed speed (225mph).

    Graph average of 225 miles-per-hour.
City-to-City Ranges
Graph showcases the Britten-Norman BN2T-4S Defender 4000's operational range (on internal fuel) when compared to distances between major cities.
Aviation Era
Pie graph section
Pie graph section
Pie graph section
Pie graph section
Pie graph section
Useful in showcasing the era cross-over of particular aircraft/aerospace designs.
Unit Production Comparison
Comm. Market HI*: 44,000 units
Military Market HI**: 36,183 units

  * Commercial Market High belongs to Cessna 172.

  ** Military Market High belongs to Ilyushin Il-2.

Supported Roles
Ground Attack
Aerial Tanker
A2A=Air-to-Air; UAV=Unmanned; CAS=Close Support; ASW=Anti-Submarine; AEW=Airborne Early Warning; MEDEVAC=Medical Evac; EW=Electronic Warfare; SAR=Search-Rescue
Commitments / Honors
Military lapel ribbon for Operation Allied Force
Military lapel ribbon for the Arab-Israeli War
Military lapel ribbon for the Battle of Britain
Military lapel ribbon for the Battle of Midway
Military lapel ribbon for the Berlin Airlift
Military lapel ribbon for the Chaco War
Military lapel ribbon for the Cold War
Military lapel ribbon for the Cuban Missile Crisis
Military lapel ribbon for pioneering aircraft
Military lapel ribbon for the Falklands War
Military lapel ribbon for the French-Indochina War
Military lapel ribbon for the Golden Age of Flight
Military lapel ribbon for the 1991 Gulf War
Military lapel ribbon for the Indo-Pak Wars
Military lapel ribbon for the Iran-Iraq War
Military lapel ribbon for the Korean War
Military lapel ribbon for the 1982 Lebanon War
Military lapel ribbon for the Malayan Emergency
Military lapel ribbon representing modern aircraft
Military lapel ribbon for the attack on Pearl Harbor
Military lapel ribbon for the Six Day War
Military lapel ribbon for the Soviet-Afghan War
Military lapel ribbon for the Spanish Civil War
Military lapel ribbon for the Suez Crisis
Military lapel ribbon for the Vietnam War
Military lapel ribbon for Warsaw Pact of the Cold War-era
Military lapel ribbon for the WASP (WW2)
Military lapel ribbon for the World War 1
Military lapel ribbon for the World War 2
Military lapel ribbon for the Yom Kippur War
Military lapel ribbon for experimental x-plane aircraft
* Ribbons not necessarily indicative of actual historical campaign ribbons. Ribbons are clickable to their respective campaigns/operations.

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