This trailer shows off the Su-27, a new aircraft coming to DCS World, Digital Combat Simulator's free-to-play aerial battleground (thanks Hank). It was announced last month that this would begin beta testing on November 15th, though the accompanying description of the video says it was released yesterday (it's probably not out yet, as it's not reflected on the DCS website). Here's a rundown on the release:

Key Features of the Su-27 for DCS World: A professional level flight model provides unmatched flight physics that allow you to truly feel what it's like to fly this amazing aircraft. A true model of the Su-27 flight control system that allows you to perform the “cobra” and other “out of the envelope” manoeuvres. Updated Head Down Display (HDD) with more realistic data link and navigation modes. Highly detailed, six-degrees-of-freedom (6 DOF) cockpit. Accurate Su-27 Flanker model, squadron markings, and weapons. New instant action, single missions and interactive training missions. Battle the F-15C in head-to-head.