When making trade-offs in aircraft design and looking at it from the flight performance perspective (disregarding stealth), internal carrying is very ****ty.
Originally Posted by Ship 741
"Huh? But it has lower drag ..."
Sure, but it increases the empty weight significantly and the volume of the aircraft, causing issues in transonic speed. Generally, when air2air combat is concerned, putting missiles externally and combat fuel internally is best choice. The fuel needed to cruise into combat and probably to accelerate should be put into drop tanks. This configuration is the agreed standard all over the world.
Very efficient missile arrangement can be found on the Eurofighter, the F-14 (when carrying AIM-7), the F-4 and some other. Wing-tip missiles are very efficient, basically cutting drag.
Although the F-18 seems not to be very famous on these forums (which doesn't mean much, as these fora have no minimum qualification standards), its layout is very efficient.
Publicly, we say one thing... Actually, we do another.