As mentioned earlier, the F-111 features variable geometry wings, an internal weapons bay and a cockpit with side by side seating. Furthermore, the aircraft is equipped with an escape crew capsule and is capable of carrying a wide range of weapons.
Although the General Dynamics F-111 was conceived as a multi-role fighter jet, the aircraft became a long-range attack aircraft which was primarily armed with air-to-surface ordnance.
Canon: All tactical combat versions are capable of carrying a single M61 Vulcan 20 mm cannon with a verly large (2,084 round) ammunition tank, coverdy ban eyelid shutter when not in use. Although the canon was carried by some USAF aircraft, it was never actually used in combat and later even removed.
Bombs: The bombs bay can alternatively hold two conventional bombs, usually consisting of the Mk 117 type of nominal 750 lb weight, although weapons of up to the Mk 118 (3,000 lb) were cleared.
Nuclear weapons: All F-111 models except the EF-111A and the Australian F-111C were equipped to carry various free-fall nuclear weapons. The FB-111A was a dedicated nuclear bomber for most of its life, and carried a wide range of nuclear weapons. Furthermore, the FB-111A could carry one or two AGM-69 SRAM nuclear missiles in its weapons bay and up to four SRAMs on external wing pylons.
Sensor pod: The F-111C and F-111F were equipped to carry the AN/AVQ-26 Pave Tack targeting system on a rotating carriage that kept the pod protected within the weapons bay when not in use. Pave Tack is a FLIR and laser rangefinder/designator that allows the F-111 to designate and drop laser-guided bombs.
Reconnaissance pallet: Australian RF-111Cs carry a package of reconnaissance sensors and cameras for tactical recce missions. It contains two video cameras, a Honeywell AN/AAD-5 infrared linescan (recorded on video or film), a Fairchild KA-56E low-altitude and KA-93A4 high-altitude panoramic cameras, and a pair of CAI KS-87C split vertical cameras. It can also record photographs of the attack radar's display.
Missiles: The F-111B was intended to be capable of carrying two AIM-54 Phoenix air-to-air missiles in the bay. General Dynamics proposed an arrangement that would allow two AIM-9 Sidewinders to be carried on a trapeze mounting in the bay (at the expense of the M61 cannon), along with a single (usually nuclear) bomb. This was not adopted, with the USAF and RAAF opting for the cannon instead. The AIM-7 Sparrow or AIM-4 Falcon, standard on the F-4 Phantom II, was never fitted, though later F-111 models had radars equipped to guide the Sparrow.