High-G Turn

The High-G Turn is a maneuver and ability introduced in Ace Combat 6: Fires of Liberation.

When the situation demands it, the player is able to override their aircraft's flight control system at will by holding their respective system controller's shoulder buttons (L2/R2 on PlayStation 3, LT/RT on Xbox 360), thus performing an extremely tight upwards turn (relative to the aircraft's nose.)

Ace Combat 6: Fires of Liberation
Ace Combat 6 is the first game of the series to implement High-G Turning. In this Ace Combat iteration, High-G mode can be entered by holding both Trigger buttons and pulling the movement stick downwards. The High-G Turn is a mostly defensive maneuver, as it is normally used to quickly evade incoming missiles. As well, High-G Turning is a tried-and-true strategy in online combat, as it can be used to mess with hostile lock-on. Under certain circumstances, such as when facing ESM-boosted ordnance, High-G becomes a neccesity to survive.

Aircaft, both integral to the game and downloaded, will lose speed when locked in High-G mode, however the speed bleedout depends on the aircraft: for example, the Rafale M and Su-47 Berkut can remain in High-G for an estimate of 3-4 seconds, while aircraft like the Mirage 2000-5 -Advanced- suffer from High-G lock - that is, they remain locked in High-G for several seconds.

Ace Combat: Assault Horizon
High-G Turns have been confirmed to return in Ace Combat: Assault Horizon. Unlike Ace Combat 6, due to Assault Horizon's more close combat-centric action, the High-G Turn now plays a more active role in dogfights. Whenever the player is chased by an enemy, they will be able to perform a High-G Turn to turn the tables and get behind their pursuer. Since certain maneuvers are restricted to certain aircraft, it is likely that High-G Turning will be an ability exclusive to the F-22A Raptor.

Trivia

 * When performing a High-G Turn, vapor will come out from the aircraft's ailerons.
 * The High-G turn made its first actual appearance in the series in Ace Combat Zero: The Belkan War, being one of the many abilities boasted by Mobius One in the secret stage, The Gauntlet. Mobius's high-Gs, however, defy the laws of physics as his aicraft is capable of pulling an square, 90°-degree turn.
 * For the sake of gameplay, all player-controllable aircraft are capable of performing a High-G turn, even those whose airframes make such turns virtually impossible to perform (ie. the A-10A Thunderbolt II.)