Complex sentence: Although several civil and military transport aircraft are larger in overall dimensions, the Tu-160 is: the largest combat aircraft, the largest supersonic aircraft and the largest variable-sweep aircraft ever built.
Split into simpler sentences: Although several civil and military transport aircraft are larger in overall dimensions, the Tu-160 is currently the world's largest combat aircraft. The Tu-160 is also the world's largest supersonic aircraft, and the largest variable-sweep aircraft ever built.