Summary and Key Points: Lockheed Martin’s F-21 is a proposed India-tailored evolution of the F-16 Block 70/72, marketed as a “fourth-generation++” fighter with modern AESA radar, upgraded cockpit displays, sensor-fusion style avionics, and open-architecture systems.
-A central selling point is “Make in India” production through an industrial partnership tied to Tata, with spillover into the global F-16 supply chain.
A 35th Fighter Squadron F-16 Fighting Falcon flies near the Korean peninsula during a dogfighting training scenario during exercise Ulchi Freedom Shield 25 at Kunsan Air Base, Republic of Korea, Aug. 20, 2025. UFS25 is a combined, joint, all-domain military training exercise that integrates ground, air, naval, space, cyber and information elements, enhancing readiness through realistic combat simulations. (U.S. Air Force photo by Senior Airman Landon Gunsauls)
-The aircraft is pitched as a high-end single-engine multirole option with expanded missile carriage via triple-launcher adapters and flexible aerial refueling options.
-Despite the promise, momentum appears to favor alternatives—especially Rafale—leaving the F-21’s India future uncertain.
In 2 Words: India’s F-16 — The Lockheed F-21 Pitch Explained
The Lockheed Martin F-21 is a proposed, advanced single-engine multi-role fighter jet based on the F-16 Fighting Falcon, specifically tailored for the Indian Air Force (IAF).
It features advanced avionics, including a modern AESA radar, new cockpit displays, and technologies derived from the F-22 and F-35. It is being offered with the potential for significant local production under the “Make in India” initiative.
The F-21 is designed to provide the IAF with enhanced air-to-air and air-to-ground capabilities while integrating India into the global fighter aircraft ecosystem.
In some aviation circles, it is considered the best F-16 variant.
F-16 Fighting Falcon Onboard USS Intrepid. Image Taken on September 18, 2025.
F-21 Block 70 Agreement
The F-21 Block 70 is designed to meet the Indian Air Force’s single-engine fighter requirements, and the proposed US-Indian industry partnership directly supports India’s initiative to develop private aerospace and defense manufacturing capacity.
This F-21 production partnership between the world’s largest defense contractor and India’s Tata Advanced Systems, Tata Group, and created Tata Lockheed Martin Aerostructures Limited. The facility in India would manufacture aircraft and components for the F-16 global supply chain.
Tata has stated, “The F-21 Block 70 is ideally suited to meet the Indian Air Force’s single-engine fighter needs, and this unmatched US-Indian industry partnership directly supports India’s initiative to develop private aerospace and defense manufacturing capacity in India.”
It will allow India to produce, operate, and export F-21 Block 70 aircraft, the newest and most advanced version of the world’s most successful, combat-proven multi-role fighter.
The F-21 will integrate fifth-generation avionics, sensor-fusion technologies, and open-system architectures to meet emerging operational demands. The F-21 is designed to be suited for India’s specific tactical and strategic theater of operations.
Three F-16 Fighting Falcons from the 31st Fighter Wing fly above Aviano Air Base, Italy, November 21, 2024. The F-16’s enduring appeal lies in its technological relevance, with continual upgrades to avionics, radar systems and weaponry ensuring it remains a formidable force in modern air warfare. (Courtesy photo by Frank Crebas)
F-21 production in India will support thousands of Lockheed Martin and F-21 supplier jobs in the US, create new manufacturing jobs in India, and position Indian industry at the center of the world’s most extensive fighter aircraft supply ecosystem.
The F-21/F-16 Block 70
The F-21 would feature specifications akin to the F-16 Block 70/72, on which it is based:
-Wingspan: 31 ft/9.45 m
-Length: 49.3 in/15.09 m
-Height: 16.7 ft/5.09 m
-Maximum Takeoff Weight: 48,000 lb/21,772 kg
-Maximum Speed: 1,500 mph/2,414 kmh
The F-21 fighter’s powerplant is the General Electric F110-GE-129 afterburning turbofan engine, which produces around 18,000 pounds of thrust dry and nearly 30,000 pounds with afterburner. This is the same engine type used in other advanced variants of the F-16 fighter aircraft.
F-16 Fighting Falcons assigned to the 114th Fighter Wing sit ready on the ramp while conducting an elephant walk at Joe Foss Field, South Dakota, July 2, 2025. The 114th Fighter Wing conducted an elephant walk to demonstrate its ability to project fighter airpower. (U.S. Air National Guard photo by Master Sgt. Luke Olson)
Most Advanced 4th-Generation Fighter
While the Eurasian Times reported that the F-21’s design and capabilities place it closer to more sophisticated fifth-generation fighters, such as the F-22 Raptor, the aircraft is still a fourth-generation++ aircraft.
Still, with features such as sensor fusion, avionics, and an advanced pilot interface, it is far more advanced than any other fourth-generation aircraft, including the F/A-18E/F Super Hornet.
This would be a major step for the IAF, which has traditionally relied on Russian weapons, as using the F-21 would require integrating compatible US weapons and sensors, changing supply systems, and retraining troops.
A U.S. Air Force F-16 Fighting Falcon assigned to the 16th Weapons Squadron flies over the Nevada Test and Training Range during a Weapons School Integration (WSINT) mission, June 9, 2025. WSINT is a graduate-level training event that combines multi-domain assets in large-force scenarios, enabling U.S. Air Force and joint service members to hone tactical expertise and integrate advanced capabilities in a dynamic threat environment. (U.S. Air Force photo by Staff Sgt. Jose Miguel T. Tamondong)
The F-21 will feature Triple Missile Launcher Adapters (TMLAs) that allow it to carry 40 percent more air-to-air weapons than previous F-16 variants.
Lockheed Martin released a video where the new variant carries ten missiles- eight medium-range, radar-guided AMRAAM missiles in addition to two AIM-9x Sidewinders. The fighter also featured an aerial refueling probe and a Snipe electro-optical targeting pod.
The F-21 features an advanced APG-83 Active Electronically Scanned Array (AESA) radar, which has detection ranges nearly double those of previous mechanically scanned array radars and the ability to track and attack more targets with higher precision.
Advantages of the F-21 Over The F-16:
The F-21 variant offers several advantages over the F-16. Some of these include:
-12,000 flight hours (the same as the F-16 Block 70)
-40 percent more air-to-air weapons carriage TMLAs
-Increased range and loiter periods
F-16 from Israel. Image Credit: Creative Commons.
-Probe/drogue & boom aerial refueling
-Latest sensors and mission avionics featuring the APG-83 AESA radar
While India has enemies in Pakistan and China, the government remains non-aligned, with no true allies. It remains close to Russia and has helped Moscow circumvent US and Western sanctions, but those tend to be more self-serving than any sense of allying with Russia.
But there hasn’t been any movement on the government of India’s proposed production of the F-21. And it probably isn’t coming any time soon. Indications are the Indians are leaning toward the Rafale.
About the Author: Steve Balestrieri
Steve Balestrieri is a National Security Columnist. He served as a US Army Special Forces NCO and Warrant Officer. In addition to writing on defense, he covers the NFL for PatsFans.com and is a member of the Pro Football Writers of America (PFWA). His work was regularly featured in many military publications.
