Compared to the JSF, the F-22 Raptor is indeed larger in size and internal volume. Nevertheless, the F-22 suffers from one key limitation. Its center bays were designed around the AIM-120 AMRAAM that is only about 12 ft (3.65 m) in length and has a maximum fin span of about 1.5 ft (0.45 m). These dimensions are quite sufficient for the aircraft's primary role as an air superiority fighter. However, the end of the Cold War forced the Air Force to change priorities and give the F-22 a stronger ground attack capability. Unfortunately, most air-to-ground weapons are significantly longer, wider, taller, and heavier than the AIM-120, making it difficult to integrate such weapons into the F-22 bays. The only weapon that has been integrated so far is the GBU-32 JDAM, a GPS-guided bomb that is about 10 ft (3.05 m) in length and is based on the 1,000 lb (455 kg) Mk-83 general purpose bomb.
Most air-to-surface weapons are in the 2,000-lb (910 kg) class, however, but these weapons are usually around 12.5 to 14 ft (3.80 to 4.25 m) long and too large to fit within the F-22. Bearing these limitations in mind, JSF designers purposefully sized the two internal bays around these larger 2,000-lb class weapons. The two weapons that have predominantly dictated the overall length and depth of the bays are the AGM-154 JSOW and the GBU-31 2,000 lb (910 kg) version of JDAM.
F-35 weapons bay
Each bay contains two weapons stations, as shown above. Air-to-ground stores like JSOW and JDAM are carried on the outboard station. Air-to-air weapons can also be carried in this position but are carried primarily on the inboard station that is specifically dedicated to that purpose. One of the unique features of the design is that the air-to-air station swings out on a hinged rail as the inboard bay door opens.
The list of weapons that the JSF will carry when it enters service has not yet been finalized. However, it has been decided that all variants will be cleared to carry the same selection of weapons regardless of whether or not each user actually intends to arm its planes with that weapon. For example, the Navy CV variant will be cleared to carry the Wind Corrected Munitions Dispenser (WCMD) even though only the Air Force has that weapon in its inventory. Similarly, all US aircraft will be compatible with the ASRAAM air-to-air missile that only the United Kingdom plans to carry on its planes. The decision to clear all variants with the same weapon loads was made in order to simplify integration requirements, maintain commonality, and lower overall development costs. Note that the above statements are no longer entirely true since the bays of the F-35B STOVL version have been reduced in size as mentioned earlier. As a result, the F-35B is no longer compatible with JSOW and 2,000 lb JDAM weapons. The largest weapon this F-35 variant can carry internally is the GBU-32 1,000 lb version of JDAM. A list of the weapons that are currently planned for internal carriage on the F-35 is shown below.
F-35 internal weapons
Not included in this diagram are weapons in source selection as of this writing that are to be added to the internal carriage list. These weapons include the American GBU-39 Small Diameter Bomb, of which four can be carried on the air-to-ground station in each bay, and a new 500 lb laser guided bomb for the British (ultimately won by the Paveway IV). Another possible addition is a new variant of JDAM being considered by the US that will add a digital scene matching capability for improved accuracy.
The F-35 also has six external pylons, three under each wing. The inboard station is designed for up to 5,000 lb (2,265 kg) loads and will most likely be used to carry external fuel tanks. The pylon can carry 2000-lb class air-to-ground weapons as well. The midboard pylon is also primarily intended for air-to-ground weapons and can carry up to 2,500 lb (1,135 kg). The surface attack weapons compatible with these two pylons include many of the same ones carried internally as well as additional stores that are too large to fit in the bays. The outboard station on each wing, however, is a dedicated air-to-air station carrying up to 300 lb (135 kg) and designed specifically for short-range infrared guided missiles like AIM-9X Sidewinder. A list of weapons currently planned for external carriage is illustrated below. Note that training bombs have not been included in this list.
Aerospaceweb.org | Ask Us - F-35 JSF Weapon Carriage Capacity
While I find myself in the position of having to defend both these airframes, so be it. The A-10 is a robust CAS airframe that has filled and continues to fill it's mission well. However the F-35 was not intended to fill the A-10 mission alone and was designed to fill a number of rolls. When you look at the weapons stores list, the F-35 is NO whimp when it comes to the ability to deliver lead on target. While I do agree that if the call was for a pure CAS aircraft it would make sense to take a look at a A-10 follow-on and this idea is a a good one if you want my opinion. However, given the current purchasing environment , I would urge you all who dismiss the F-35 to take a look at it again. Especially the F-35B which in my opinion represents the best in aviation innovation.
[ame=http://www.youtube.com/watch?v=kKp4S5jvDLg&feature=related]YouTube - F 35B Vertical Take Off and Landing[/ame]