The title may be a little confusing but this is what I am thinking. Was there ever an attempt to make a large plane kind of like a capital ship or battleship of the sky. Something with long-range and hard-hitting heavy-caliber cannons, Multiple Engines, a large crew, and would serve as the head of an attack squadron. Something like a mini star destroyer that we see in Star Wars able to quickly intercept an oncoming attack or boost an offensives firepower. This might be a weird way of phrasing things so please take it lightly. Thanks!