The US Navy considered developing the F-15N Sea Eagle as a faster, lighter and cheaper alternative to the F-14. But modifying the F-15 with folding wings and stronger landing gear for carriers negated its advantages.
Perhaps the most widely recognized US Navy fighter thanks to its starring role in Top Gun, the F-14 Tomcat served as an advanced interceptor and air superiority fighter, capable of attacking six enemy aircraft simultaneously at a range of over 100 miles with the AIM-54 Phoenix missile.
Advancements during the Cold War in Soviet long-range patrol and bomber aircraft dictated a requirement for a fleet defense fighter that could engage high-altitude bombers from well beyond visual range. The iconic F-14 Tomcat was Grumman’s answer. Needing an interceptor’s high speed while carrying this heavy ordnance, Grumman produced the highly effective variable sweep wing of the F-14, enabling it to operate at a wide range of airspeeds.
The Navy’s search for an advanced carrier-based air superiority fighter led to evaluation of General Dynamics’ F-111B, an aircraft that would promote the Department of Defense’s aim of commonality with the Air Force and its F-111A. The F-111B, having been modified to meet Navy mission requirements, was deemed too heavy for carrier operations and the contract was cancelled in April 1968. Subsequently, the Navy inaugurated a new design contest for what was termed the VFX program, the two primary competitors being McDonnell Douglas and Grumman.
Grumman’s Model 303 proposed a variable-geometry, two-seat, twin-engined design built around the Hughes AWG-9 weapons system.
McDonnell Douglas instead offered a “navalized” version of its new F-15 Eagle air superiority fighter. A wing hinge, proper arresting hook and strengthened landing gear were among the modifications for the F-15N. According to DriveTribe, even with the weight imposed by these changes, the F-15N was expected to still be able to outmaneuver the F-14. However, the initial proposal did not include were the AIM-54 Phoenix missiles or the AN/AWG-9 radar needed to aim and fire them. A study by the US Navy included adding the radar and AIM-54s, but the resulting aircraft would have weighed 10,000lbs more than a standard F-15A, erasing any advantage the Sea Eagle might have had. McDonnell Douglas, along with Hughes Aircraft, maker of the AIM-54 and the radar, worked up a proposal to modify the F-15s AN/APG-63 radar to interface with the AIM-54.
A Senate subcommittee began to study the proposal in 1973, and was later expanded to include a stripped F-14 variant and an upgraded F-4. A fly-off between the F-14A and F-15N was brought up, but was never held.
The Navy ultimately stuck with the F-14, that proved to be an extremely capable aircraft. Following Grumman’s tradition of naming its aircraft after cats, the new “Tomcat” made its first flight in December 1970. After a number of changes following flight testing, the first F-14As were delivered to the Navy in June 1972, with Fighter Squadron (VF) 124 designated to provide crew training. On the West Coast, VF-1 and VF-2 were the first operational squadrons to receive the new aircraft, while on the East Coast VF-14 and VF-32 became the first Atlantic fleet Tomcat squadrons.
Photo credit: Combat Ace and McDonnell Douglas/Boeing via DriveTribe