KT-1 Woongbi

The KAI KT-1 Woongbi is a South Korean single-engined turboprop basic trainer developed jointly by Korea Aerospace Industries (KAI) and the Agency for Defense Development (ADD). It entered Republic of Korea Air Force (ROKAF) service in 2000 and was the first Korean-designed aircraft to be exported, with customers in Indonesia, Turkey, Peru and Senegal.

Development

The programme originated as KTX, launched in 1988 for the ROKAF. ADD oversaw the project while KAI carried out detailed design and most manufacturing. Nine prototypes were built, the first completed in June 1991; the aircraft was named 'Woongbi' in 1995, and the final test flight was announced in 1998. In 2002 KAI disclosed work on an armed derivative designated KO-1 for forward air control and counter-insurgency duties, answering a ROKAF requirement for 20–40 aircraft and marketed towards Latin American drug interdiction users. From 2005 the KT-1 was offered as part of an integrated training package alongside the KAI T-50 Golden Eagle. In June 2025 KAI proposed establishing KT-1 production lines in Indonesia, and on 20 October 2025 signed a framework agreement with Indonesian Aerospace (PT DI) covering gradual transfer of production and maintenance to Bandung.

Design

The KT-1 seats two and is powered by a single Pratt & Whitney Canada PT6A-62 turboprop of 708.4 kW (950 shp) driving a four-bladed Hartzell constant-speed reversible propeller of 2.44 m diameter. Maximum speed is 644 km/h at 4,570 m, service ceiling 11,580 m, and range 1,333 km on internal fuel, extending to 2,070 km ferry. Empty weight is 1,910 kg and maximum take-off weight 3,311 kg with external stores; g limits are +7/-3.5 clean. Cockpits are offered in analogue or glass configuration, with options including NVG compatibility, HUD, multi-function displays, GPS/inertial navigation, mission computer, onboard oxygen generation, vapour-cycle environmental control and HOTAS controls. Avionics are sourced from Elbit, Flight Vision and Thales.

Armament

Armed versions carry stores on four underwing pylons, two per wing. Munitions include gun pods, rocket launchers, unguided bombs, training missiles and chaff/flare dispensers; a 12.7 mm gun pod is fitted to the KT-1C. Inboard pylons can mount 189 L drop tanks, and a centreline forward-looking infrared pod and laser range finder are available. Unarmed ROKAF trainers retain provision for practice bomb carriers.

Operational History

The first KT-1 was handed to the ROKAF in 2000, with eight delivered by year-end at a rate of two per month; a follow-on order for 20 aircraft came in November 2003. The ROKAF received 85 KT-1s and 20 KA-1s. Indonesia exchanged eight CASA/IPTN CN-235 transports for 12 KT-1Bs in 2001, taking first delivery on 25 April 2003 and ordering three more in November 2018; Indonesian aircraft equip the Jupiter Aerobatic Team, which lost two in a midair collision at Langkawi on 15 March 2015. Turkey contracted for 40 (+15) KT-1Ts in June 2007 in a deal involving K2 Black Panther armour technology, with deliveries completed in late 2012 and 15 more ordered in April 2015. Peru signed for 20 KT-1P/KA-1P aircraft on 6 November 2012 for about US$208 million, with local assembly by SEMAN from April 2015; they serve with Escuadrón Aéreo 512 at Pisco as the Torito. Senegal operates four KA-1S.

Variants

• KTX-1 Yeo-myung: Prototype primary trainer, six built with differing engines, the first two using the 550 shp PT6A-25A.
• KT-1: ROKAF basic trainer, larger and heavier than the prototype with relocated tail surfaces and the 950 shp PT6A-62.
• KA-1: Armed advanced trainer with light attack and forward air control capability, adding HUD, up-front control panel, MFDs and four hardpoints.
• KT-1B: Indonesian export version with reduced or commercial off-the-shelf avionics.
• KT-1C: Armed export version with centreline FLIR pod and provision for a 12.7 mm gun pod, rockets and unguided bombs.