Northrop Grumman EF-111 Raven

Northrop Grumman EF-111 Raven The EF-111 Raven was an electronic warfare conversion of the General Dynamics F-111 Aardvark series produced by Northrop Corporation for the United States Air Force. Designed to provide radar jamming and electronic countermeasures in support of TAC and United States Central Command operations, the Raven served through conflicts such as the Gulf War and operations over Bosnia and Herzegovina. The Raven complemented airborne early warning platforms like the E-3 Sentry and worked alongside strike aircraft including the F-15E Strike Eagle, F-16 Fighting Falcon, and B-52 Stratofortress.

Design and Development

The Raven program began when General Dynamics converted F-111A airframes into dedicated electronic warfare platforms under contracts awarded in the late 1970s, with production carried out by Northrop Corporation after acquisition arrangements. Designers integrated systems from firms such as Raytheon, Westinghouse Electric Corporation, and ITT Corporation to create an advanced AN/ALQ-99-class capability adapted to the F-111 airframe; avionics suites included sensors, receivers, and emitters to counter Soviet Union-origin air defenses like the S-75 Dvina and S-125 Neva/Pechora. The airframe retained the F-111’s terrain-following radar heritage from programs involving Grumman, General Electric, and other subcontractors, while structural changes accommodated the internal jamming equipment and modified electronic pylons used previously by platforms such as the EA-6B Prowler. Flight testing occurred alongside involvement from Wright-Patterson Air Force Base and operational testing with Davis-Monthan Air Force Base and Mountain Home Air Force Base.

Operational History

EF-111 Ravens entered service with United States Air Force Tactical Air Command squadrons and were deployed during crisis operations including Operation El Dorado Canyon, Operation Desert Shield, and Operation Desert Storm. During the Gulf War, Ravens provided escort jamming for strike packages including F-111F Aardvark and A-10 Thunderbolt II units against integrated air defense systems such as IADS networks employing SA-2 Guideline and SA-3 Goa systems. Ravens supported NATO operations over Bosnia and Herzegovina and participated in no-fly zone enforcement in Iraq during Operation Provide Comfort and later Operation Southern Watch. The platform’s ability to deny enemy radar coverage complemented Lockheed Martin-built platforms and was coordinated through command centers including CENTCOM and USAFE. Losses included aircraft destroyed by accidents and one notable shootdown claim during high-threat environments, prompting tactical doctrine updates shared with units equipped with the EA-6B Prowler and later EA-18G Growler community.

Variants and Modifications

Primary conversions were designated EF-111A, derived from the F-111A airframes modified with dedicated electronic warfare systems installed in former weapons bays and fuselage fairings. Modifications encompassed improvements to jamming transmitters, receiver sensitivity, and onboard countermeasure suites produced in iterative blocks similar to upgrade approaches used by McDonnell Douglas and Lockheed. Field modifications by depot facilities at Ogden Air Logistics Center and contractor support from Northrop Corporation added tailored avionics and mission planning computers compatible with Joint Chiefs of Staff tasking. No two-seat reconnaissance or tanker conversions entered service; the Raven remained a single-mission electronic attack asset until retirement.

Operators and Units

The EF-111 was operated exclusively by the United States Air Force; principal units included the 20th Tactical Fighter Wing and the 42d Electronic Combat Squadron at bases like RAF Upper Heyford and Mountain Home Air Force Base. Other operational units and detachments served with 16th Tactical Reconnaissance Squadron-style organizations and were task-organized into composite wings alongside 401st Tactical Fighter Wing and NATO-assigned elements during European deployments. Ravens were commonly assigned to Tactical Air Command task forces and attached to CENTAF during Middle East operations.

Survivors and Displays

Several EF-111A airframes survive as museum exhibits and gate guardians. Preserved examples are on display at institutions such as the National Museum of the United States Air Force in Dayton, Ohio, the Pima Air & Space Museum in Tucson, Arizona, and the Hill Aerospace Museum in Utah. Other airframes are exhibited at regional sites including Moffett Field Historical Society-related collections, the Gulf Coast Military Aviation Museum, and various veterans’ memorials, often restored by organizations like the Veterans Administration volunteer groups and local air shows organizers. These displays illustrate the Raven’s role alongside contemporaries like the F-4 Phantom II and the EA-6B Prowler in late 20th-century electronic warfare development.

Category:Electronic warfare aircraft Category:United States Air Force aircraft