March 31, 2015 at 12:13 pm
How would it be possible to have 2 variants of a fighter, one being almost pure air to air ( say 90% a-a), the other half air to ground and half air to air.
The goal is to build both on the same production line and have commonality for all the expensive subsystems, and to have full stealth on both.
Let’s say that CFT/CWB cannot be used for stealth reasons.
I think the following idea would work.
Take the F-22 design at about 2/3 scale and make 2 variants of it:
Air to air variant:
– side bays capable of launching either the AIM-9 or AIM-120 like on the FB-22. The 9X is carried for a2a missions, the AIM-120 is carried on strike missions.
– relatively narrow fuselage with relatively shallow main bays that can carry 4 SDBs or 2 AMRAAMs each. Pylon capable of carrying a 2000lbs weapon.
– chin mounted dedicated IRST in the space of the EOTS.
– ability to carry the sniper pod if necessary for strike missions.
– canope with 360 field of view or almost ( similar to the F-22 )
– possibly trust vectoring, although I doubt it is really necessary with an HMCS.
– Performances:
* supercruise mach 1.4-1.5
* top speed mach 2
* range : 475 nm.
* 12 tons empty
* low wing loading giving a high maneuvrability and ability to land on a carrier for a possible CV variant.
Air to ground variant:
– same side bays.
The fuselage is modified like this:
* modified bay doors similar to the F-35’s and FB-22’s bays, to have about 15cm more depth for larger weapons.
* modified upper fuselage stucture for more internal fuel. Think of what they’ve done on the mig-35 to increase the internal fuel. The same thing would be done to increase the internal fuel by 30%.
– chin mounted EOTS instead of the IRST.
– Performances:
* supercruise Mach 1.2
* top speed mach 1.7
* range 600 nm.
* 13 tons empty.
* higher wing loading than the a2a variant so less maneuvrability.
I don’t think it would cost that much to develop a second variant, maybe 2-3 billion more. 1/3 a2a and 2/3 a2g would be a good split.
Eventually there could be a naval variant of the air to air variant thanks to the low wing loading, which would help for carrier landing.
No STOVL variant, it complicates the development too much, and the fuselage become too fat.
If the USAF/USN had done something like that instead of the F-22/F-35, they would have many more stealth fighters by now. Maybe the USAF around 400 and the USN 250. Field the IRST first on the a2a variant with the external sniper pod for strike. A following block would get the EOTS for the a2g variant.