In 1977, General Dynamics proposed an advanced version of the FB-111A, the FB-111H, to compete with the Rockwell B-1 bomber. The FB-111H was quite similar to the proposed FB-111B, with advanced avionics, General Electric F101 turbofans, and six underwing stores pylons. However, it had an enlarged internal weapons bay capable of carrying up to 12 SRAMs.
A modified version would have had a ten-foot longer fuselage and would have carried twelve cruise missiles on underwing pylons plus four SRAMs carried internally.
Since the Rockwell design was the winner of the contest, the FB-111H never progressed beyond the study phase.
Sources:
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United States Military Aircraft Since 1909, Gordon Swanborough and
Peter M. Bowers, Smithsonian, 1989.
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General Dynamics Aircraft and their Predecessors, John Wegg,
Naval Institute Press, 1990.
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Post-World War II Fighters: 1945-1973, Marcelle Size Knaac,
Office of Air Force History, 1986.
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The American Fighter, Enzo Angelucci and Peter Bowers,
Orion, 1987.
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F-111 Aardvark–USAF’s Ultimate Strike Aircraft, Tony Thornborough,
Osprey Aerospace, 1993.
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F-111 Aardvark, Hans Halberstadt, Specialty Press, 1992.
