Sky Warriors/Aircraft

There are several aircraft in Sky Warriors to choose from. Currently there are four tiers of aircraft.

There is also the aircraft's cost in either diamonds or coins. Players can spend coins to unlock the next aircraft in the list, or they can skip ahead and unlock a new aircraft using diamonds without unlocking the previous aircraft.

The Harrier II Jump Jet, the AV-8B, and the MiG-21 are the only aircraft that can be purchased with coins. All others require diamonds.

Statistics
Aircraft are rated in four categories:
 * Durability, or how much damage the aircraft can take.
 * Firepower, or how much damage the aircraft does with attacks.
 * Manoeuvrability, or the aircraft's ability to turn.
 * Speed, or how the aircraft flies in straight lines.

The full statistics list of all aircraft is as follows:

Upgrades
Each of the four categories - durability, speed, manoeuvrability, and firepower - can be upgraded by upgrading the airframe and its avionics.

Upgrades can only be performed via coins, though once the upgrade process begins, its upgrade timer can be skipped by spending diamonds.

Each category can be upgraded ten levels, with each level giving fewer and fewer returns and taking longer. Aircraft can be used in-game during the upgrade process. At higher levels, some upgrades will begin to reduce the aircraft's performance in other areas.

The aircraft can be upgraded in five areas:


 * Cockpit upgrades improve durability and speed.
 * Fuselage upgrades improve durability.
 * Engine upgrades improve speed.
 * Weapon upgrades improve firepower.
 * Wing upgrades increase manoeuvrability.

Customization
Diamonds can be spent on decals and paint jobs that provide improvements to the aircraft's statistics.

Tier 1 paints are solid colours (midnight black, cobalt blue, lush green, metallic orange, arctic white, etc.) and all provide slight bonuses to durability and firepower. Tier 2 paints are camoflage patterns and provide larger bonuses.

Decals also come in two tiers, and there is one decal improving each stat:

Decals only last a certain amount of time, requiring them to be re-purchased for the bonus again.