Was the Navy’s F-111 Really That Bad? [LONG ARTICLE - GOOD PHOTOS]
Sep 2018 Robert Bernier; Air & Space Magazine"The controversy swirling around the F-35 joint strike fighter echoes previous battles fought over aircraft tasked with serving more than one master. Perhaps the central question in today’s debate is whether a single airplane designed to perform many missions adequately is a better and truly more affordable choice than several airplanes, each designed to perform a single mission flawlessly. In 1968, the Navy had an unequivocal answer: No. But were they right?...
…[McNamara] designated the Air Force to be the TFX program manager, forcing a reluctant Navy to adopt what would essentially be a version of the Air Force’s bomber. Both services initially agreed on a twin-engine, two-seat airframe, featuring a novel swing-wing design. Beyond that, their design requirements quickly diverged, and as “McNamara’s airplane” developed, so did the Navy’s opposition to it....
...Future air battles would be fought well beyond visual range, won by whichever side came equipped with the best sensors and missiles. The launch platform could fly like a dog; the real dogfighting would be done by the missiles. The Missileer was canceled, but the concept evolved into the Navy’s version of the TFX, which was soon designated the F-111B.
General Dynamics lacked experience in building carrier airplanes, so it partnered with venerable Grumman Aircraft to build the F-111B. Grumman had not only earned a reputation for building tough airplanes, it also had previous experience building a swing-wing fighter prototype, the XF10F Jaguar. The Jaguar was scrubbed in 1953, but lessons learned would be applied to the F-111.
The F-111B was to be the most sophisticated design of its era. Not only would it be the first production warplane with a variable-sweep wing, an ambitious undertaking, it would also be the first to incorporate afterburning turbofan engines, capable of propelling the airplane to Mach 2 while still boasting a long range in fuel-efficient cruise. A brand-new, ultra-long-range radar would find targets for the new Hughes AIM-54A air-to-air missile, which itself had a 100-mile range....
...The interceptor was big—it had to be, to carry hours of loiter fuel and a load of six 13-foot-long Phoenix missiles weighing 1,000 pounds each. (With a maximum takeoff weight of 88,000 pounds, a fully loaded F-111B was heavier than a similarly equipped F-14; both were far weightier than other fighters of the time.) Then there was the Air Force requirement for a ground-hugging supersonic speed capability, which called for design features not wanted by naval planners that added weight and expense to the common F-111 airframe. Commonality, along with engine headaches, hindered progress and increased costs.
Engineers worked tenaciously to make the F-111B acceptable for carrier duty. They trimmed more than a ton of weight from the airframe, which along with aerodynamic refinements lowered the airplane’s landing speed to 115 knots (132 mph). Higher-thrust versions of the TF30 turbofan enhanced performance, and redesigned engine inlets all but eliminated compressor stalls....
...McNamara resigned his position in February 1968, and the controversial F-111 program lost its strongest promoter in the Pentagon. By then, the price of the Navy’s version had skyrocketed from a projected $3 million per copy to $8 million ($59 million in 2018 dollars)….
...As a young maintenance supervisor, Mike Glenn worked on the four F-111Bs loaned to Hughes Aircraft for Phoenix missile testing. Later, he would also support early F-14s flown by the company. Glenn got a close look at both big airplanes.
Not shy about expressing an opinion, Glenn believes the Navy would have been smart to buy about 40 or so F-111Bs and deploy small detachments of them to carriers for fleet air defense. “This would have given Grumman time to properly develop the F-14,” he explains. The Tomcats had their own share of teething problems.
“By the last F-111B built, Grumman and GD had worked out the bugs. I will tell you that [prototype] number 7 could fly circles around our early F-14s—longer, faster, and very maintenance-friendly compared to earlier F-111Bs and F-14s.”…
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One justification then given for scrubbing the interceptor was its perceived lack of carrier compatibility, but oddly, the airplane wasn’t tested aboard a carrier until after its cancellation, and only then “at the insistence of Secretary Ignatius,” notes Coulam.
In the summer of 1968, when the fifth F-111B prototype flew its carrier trials, Pete Pettigrew was aboard the USS Coral Sea. To the surprise of many, the big interceptor completed its evaluations without major problems. “It flew a nice approach, wasn’t too fast, and performed well on the ball,” says Pettigrew. “They were pretty happy about it.” But he quickly adds, “If all you were trying to do was land aboard ship…then the plane was all right.”…
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Several analysts have pointed to the Navy’s experience with the F-111 as a cautionary tale for services deploying the F-35. One pattern the airplanes share is harsh judgment leveled by a chorus of critics before the craft proved themselves in operations. Though the Navy never took to the F-111, the Air Force accepted more than 500 in various roles, including strategic bombing and electronic warfare. Despite an inauspicious combat introduction over Southeast Asia in 1968, Air Force F-111s would mature into exceptional attack aircraft. Indeed, different versions of “McNamara’s airplane” went on to serve for 30 years, with EF-111 electronic warfare variants deployed to the Persian Gulf as late as 1998. The Australian air force picked up two dozen more, and kept the F-111 as its main attack airplane until 2010.
The Air Force and Navy have proved that a single airframe can be adapted for their different needs—the F-4 Phantom flew for both services beginning in the 1960s until, for the Navy, well into the 1980s, and for the Air Force, into the 1990s. Yet the debate continues, as heated now as it was decades ago when the Pentagon introduced the then-novel concept of an “affordable” joint-use warplane."
Source: https://www.airspacemag.com/military-av ... 180969916/