KF T.86 Mester

{Infobox aircraft }}
 * name        = KF T.86 Mester
 * type        =  Light Combat Aircraft (J.90)
 * manufacturer = Kongelig Flyfabrikk
 * image       = File:HW-355 (16259383024).jpg
 * designer    = Ringerike
 * first flight = 4 April 1981
 * introduction = 1986
 * retired     =
 * number built =
 * primary user = Royal Ringerike Air Force (Luftforsvaret) Royal Ringerike Navy (Kongelig Marine)
 * status      = In Service and In Production
 * unit cost   =
 * variants with their own articles =

The T.86 Mester (Anglic: Master) is a Ringeriker single engine Advanced Trainer and light combat aircraft. It was designed to replace the J.60 Spurvhauk in most capacities, including its use with the 504th Display Squadron (The Red Knights). It is configured with a tandem seat layout and low cantilever wing and designed with a low cost and high ease of serviceability in mind.

Prototypes

 * KF Eks.81: Prototype first flown in 1981, broadly similar to the first production models.

Production Models

 * T.86 Mester: First production model entering service in 1986.


 * T.86 Mester A: Introduced in 1990 the A program added combat and weapons training capabilities, originally aimed at export customers the program was almost immediately picked up by the Ringeriker Armed Forces,


 * T.88 Havmester: The Havmester (Anglic:''' Sea Master) is a carrier capable variant operated in small numbers by the Kongelig Marine.


 * T.07 Mester B: Advanced Lead-in-Fighter Trainer developed to replace the original models in Ringeriker service, equipped with a new glass cockpit and avionics suite.


 * J.90 Krigmester: The J.90 (Anglic: War Master) is a single-seat, lightweight multi-role combat aircraft for air defence, air-denial, anti-shipping, interdiction, close air support, and ground attack. The space usually occupied by a second seat is filled with a fire control computer, multimode radar, wingtip missile support as well as greater wing area, increased wing droop, larger flaps and an optional mid-air refueling capability. Primarily aimed at the export market, it is in service in small number with the Luftforsvaret.


 * J.10 Krigmester B: The Krigmester B is an upgrade of the J.90 based on the T.07 making use of it's upgraded systems.