This launch trailer from IL-2 Sturmovik: Cliffs of Dover shows off 1C: Maddox Games' upcoming combat flight simulator set during World War II's pivotal Battle of Britain. The clip features several different aircraft, and snippets of air-to-air and air-to-ground combat. The clip ends saying the game is due Spring 2011, and a couple of weeks ago Ubisoft announced it is due on April 26. Here's the embedded version.