Weapons

F-15 maintainer explains why even though NASA equipped an Eagle with an AIM-54 the USAF Never Outfitted its F-15 fleet with the mighty Phoenix

The odd photos in this post show an F-15 Eagle fighter jet carrying an AIM-54 Phoenix long-range air-to-air missile.

The Hughes AIM-54 Phoenix missile was the US Navy’s only long-range air-to-air missile. It was an airborne weapons control system with multiple-target handling capabilities, used to kill multiple air targets with conventional warheads. Simultaneous launch was possible against up to six targets in all weather and heavy jamming environments. The improved Phoenix, the AIM-54C, could better counter projected threats from tactical aircraft and cruise missiles.

The only aircraft capable of carrying the Phoenix (in clusters of up to six missiles) was the F-14 Tomcat.

Nevertheless, the odd photos in this post show an F-15 Eagle fighter jet carrying an AIM-54.

At the time these pictures were taken, researchers at NASA’s Dryden Flight Research Center at Edwards, CA, and the Naval Air Warfare Center Weapons Division, China Lake, CA, investigated the use of surplus demilitarized Navy AIM-54 Phoenix air-launched missiles as possible hypersonic test platforms or testbeds. Hypersonic flight is defined as aerodynamic flight at speeds of Mach 5 or greater, and use of surplus Phoenix missiles was one of the methods being considered to obtain critical flight data in the hypersonic regime.

NASA Dryden aircraft and avionics technicians (from left) Bryan Hookland, Art Cope, Herman Rijfkogel, and Jonathan Richards install the nose cone on a Phoenix missile prior to a fit check on the center’s F-15B research aircraft. Robert Garcia watches in the background.

These missions, conducted over restricted military test ranges, involved launching a missile from a NASA F-15 aircraft flying at speeds up to Mach 2.0, with the missile then accelerating to speeds up to Mach 5.0, depending on its trajectory before fuel is exhausted. The missiles would carry experimental research payloads into the hypersonic regime, something that is currently difficult to achieve.

The Phoenix missiles used for hypersonic research had their explosive warheads removed, and their tracking and guidance systems replaced with a smaller, more lightweight guidance system. The missiles were also heavily instrumented to obtain and transmit test data from experiments in such areas as thermal protection materials, scramjet propulsion, guidance & control, boundary layer transition, and aerodynamics at hypersonic speeds.

NASA performed design, analysis, and testing that lead up to a Critical Design Review at the end of 2007. As part of the preliminary studies, several “captive-carry” flights were be flown by the F-15 with an inactive missile with no propellant carried on the aircraft’s centerline pylon to determine the performance of the aircraft when carrying the missile. However, the project was not been funded to conduct actual launches to obtain hypersonic flight test data.

An inert AIM-54 Phoenix missile nestled under the fuselage of NASA Dryden’s F-15B aircraft.

Since the photos in this post clearly show that the Eagle could be equipped with the mighty Phoenix one might ask why US Air Force (USAF) F-15d never carried the AIM-54.

‘I was with the F-15 program for about 10 years, maybe a little more. I know the airplane extremely well,’ said James Cowan, former F-15 Eagle maintainer, on Quora. ‘To begin with, the F-15A was equipped with the Hughes APG-63 radar, which worked well with both AIM-9 Sidewinders and AIM-7 Sparrow missiles.

‘There have been significant upgrades to that radar and with the AIM-120 replacing the AIM-7, the combination is very adequate in the F-15’s operating environment.

‘The AIM-54 Phoenix and AWG-9 radar were Navy-mission-specific and in and of themselves, were an integrated weapon system. The AWG-9 could also manage AIM-7 and AIM-9 missiles. The AWG-9 had the capability to fire missiles at six targets simultaneously, and track 24 more. This was essential because the F-14 at the time had one job: to protect the multi-billion-dollar carriers. So, the F-14 was optimized as an interceptor. And it excelled in that role.

This print is available in multiple sizes from AircraftProfilePrints.com – CLICK HERE TO GET YOURS. F-15C Eagle 36th TFW, 22d TFS, BT/79-051 / 1981

‘The F-15 operates in an entirely different environment, and within Air Force Doctrine. While the F-15 is certainly a potent interceptor, most of all it is a tactical air superiority fighter—made to mix it up with other fighters—dogfighting, usually over land. Desert Storm was a made to order war for the F-15. Everything about the F-15 was virtually perfect for that environment. Of the 36 Iraqi fighters shot down, the F-15 got 34 of them. The Navy F-18’s got the other two. I will also note that both aircraft were built by McDonnell Douglas in St Louis MO, now folded into Boeing.

‘So, while the F-14 and F-15 have some outward similarities and some mission overlap, they’re really apples and oranges when you get right down to it. Because the F-14 is a Navy fighter, it has to be built much more rugged than USAF fighters. The abuse Navy fighters get is much tougher than USAF landing on long concrete runways.’

Cowan concludes: ‘I’m not sure in my own mind whether or not the F-15’s radar is compatible with the AIM-54, and even if it was, it’s too heavy for the F-15 to use and keep all of its fantastic air to air capabilities.’

Photo credit: Tom Tschida / NASA

This model is available to order from AirModels – CLICK HERE TO GET YOURS.
Dario Leone

Dario Leone is an aviation, defense and military writer. He is the Founder and Editor of “The Aviation Geek Club” one of the world’s most read military aviation blogs. His writing has appeared in The National Interest and other news media. He has reported from Europe and flown Super Puma and Cougar helicopters with the Swiss Air Force.

Recent Posts

Video features former Viggen pilot explaining how JA-37 fighter jocks could achieve radar lock on SR-71 Blackbird Mach 3 spy planes

JA-37 Viggen fighter jocks achieving radar lock on SR-71 Blackbird Mach 3 spy planes The… Read More

23 hours ago

USAF McDonnell Douglas YC-15 pilot recalls AMST program failing to replace the C-130 Hercules

McDonnell Douglas YC-15 Vs Boeing YC-14 The McDonnell Douglas (now Boeing) YC-15 was a four-engine… Read More

2 days ago

“Wild Weasel sighted SAM site—Destroyed same.” The story of Wild Weasel’s First Kill

The F-100F Wild Weasel After the single-seat, supersonic F-100 fighter entered service in 1954, it… Read More

2 days ago

USAF predicted a six-year U-2 development plan but thanks to CIA spymaster Richard Bissell and Lockheed Aircraft engineer Kelly Johnson it was deployed in slightly over a year

Richard Bissell Richard Bissell, the senior Government official who took responsibility for the Central Intelligence… Read More

3 days ago

Photos show Wright-Patterson AFB and US Air Force Museum damaged by tornado

Wright-Patterson AFB and US Air Force Museum damaged by tornado On Feb. 28, 2024 Wright-Patterson… Read More

3 days ago