Uploaded January 2025 | Updated September 2026, 5 days ago
F-4X – The Phantom That Could Chase a MiG-25
In the early 1970s, General Dynamics and the Israeli Air Force quietly collaborated on one of the most ambitious upgrade programs for the venerable F-4 Phantom. Born out of a need for a high-speed reconnaissance platform that could counter the growing threat of Soviet MiG-25 Foxbats, the result was the F-4X—a “Super Phantom” capable of reaching speeds rivaling Mach 3.
This documentary explores the little-known history of the F-4X and its reconnaissance counterpart, the RF-4X, including the political, technical, and strategic considerations that shaped—and ultimately doomed—the project.
Covered in this episode:
• Israeli reconnaissance challenges over Egypt and the search for a high-speed, high-altitude aircraft
• Origins of the F-4X concept and the Peace Jack program
• Use of water-injection and pre-compressor cooling to boost J79 engine thrust by up to 50%
• Proposed capabilities: Mach 2.7–3.2 speeds and service ceiling over 75,000 feet
• Integration of the HIAC-1 LOROP camera and streamlined nose-mounted sensors
• Technical hurdles: turbine stress and compressor blade failures
• U.S. Air Force interest in the RF-4X variant and subsequent withdrawal due to F-15 program conflict
• Export control concerns and the eventual compromise to restrict Israeli variants to reconnaissance-only use
• Final production of three Israeli RF-4E(S) aircraft, their high-altitude roles, and retirement in 2004
Though the F-4X never entered production, its development illustrated just how far the Phantom could be pushed when backed by ingenuity and strategic need. In performance terms, it may have outpaced the MiG-25—but politics, funding, and inter-service rivalries ensured it would remain a footnote in Cold War aviation history.
CONTENTS
00:00 Intro
00:26 Background
01:46 G-139 recce pod
02:33 Skyburner
02:56 Operation Peace Jack
06:21 An Export Problem
07:58 Israel remains in the Peace Jack program
09:26 Israel gets her aircraft - RF-4E(S)
10:54 Wrap up
Please consider supporting this channel by subscribing at our Members & Merch shop at https://peacemaker.fashion
_____________ Disclaimer _____________
Original footage and recreated scenes (using DCS, War Thunder, etc) may not be 100% accurate to the event being described but has been used for dramatic effect. This is because there may not have been original footage of a particular event available, or copyright prevents us from showing it. Our aim is to be as historically true as we can be given the materials available.
Copyright disclaimer under fair dealing sections ss 40/103C, ss 41/103A,ss 42/103B of the Copyright Act which includes research, study, criticism, review, and reporting of news. Copyright remains with the respective owners. These videos are made for educational purposes only.
The Australian Military Aviation History Association is a not-for-profit association with the intent of recording, preserving and promoting Australian military aviation history.
F-4X – The Phantom That Could Chase a MiG-25
In the early 1970s, General Dynamics and the Israeli Air Force quietly collaborated on one of the most ambitious upgrade programs for the venerable F-4 Phantom. Born out of a need for a high-speed reconnaissance platform that could counter the growing threat of Soviet MiG-25 Foxbats, the result was the F-4X—a “Super Phantom” capable of reaching speeds rivaling Mach 3.
This documentary explores the little-known history of the F-4X and its reconnaissance counterpart, the RF-4X, including the political, technical, and strategic considerations that shaped—and ultimately doomed—the project.
Covered in this episode:
• Israeli reconnaissance challenges over Egypt and the search for a high-speed, high-altitude aircraft
• Origins of the F-4X concept and the Peace Jack program
• Use of water-injection and pre-compressor cooling to boost J79 engine thrust by up to 50%
• Proposed capabilities: Mach 2.7–3.2 speeds and service ceiling over 75,000 feet
• Integration of the HIAC-1 LOROP camera and streamlined nose-mounted sensors
• Technical hurdles: turbine stress and compressor blade failures
• U.S. Air Force interest in the RF-4X variant and subsequent withdrawal due to F-15 program conflict
• Export control concerns and the eventual compromise to restrict Israeli variants to reconnaissance-only use
• Final production of three Israeli RF-4E(S) aircraft, their high-altitude roles, and retirement in 2004
Though the F-4X never entered production, its development illustrated just how far the Phantom could be pushed when backed by ingenuity and strategic need. In performance terms, it may have outpaced the MiG-25—but politics, funding, and inter-service rivalries ensured it would remain a footnote in Cold War aviation history.
CONTENTS
00:00 Intro
00:26 Background
01:46 G-139 recce pod
02:33 Skyburner
02:56 Operation Peace Jack
06:21 An Export Problem
07:58 Israel remains in the Peace Jack program
09:26 Israel gets her aircraft - RF-4E(S)
10:54 Wrap up
Please consider supporting this channel by subscribing at our Members & Merch shop at https://peacemaker.fashion
_____________ Disclaimer _____________
Original footage and recreated scenes (using DCS, War Thunder, etc) may not be 100% accurate to the event being described but has been used for dramatic effect. This is because there may not have been original footage of a particular event available, or copyright prevents us from showing it. Our aim is to be as historically true as we can be given the materials available.
Copyright disclaimer under fair dealing sections ss 40/103C, ss 41/103A,ss 42/103B of the Copyright Act which includes research, study, criticism, review, and reporting of news. Copyright remains with the respective owners. These videos are made for educational purposes only.
The Australian Military Aviation History Association is a not-for-profit association with the intent of recording, preserving and promoting Australian military aviation history.
