T-25 Universal

The Neiva N621 Universal is a Brazilian propeller-driven basic trainer and ground attack aircraft manufactured by Indústria Aeronáutica Neiva. Designed in 1963 by Joseph Kovács to replace the T-6 Texan and Fokker S-11/S-12 training aircraft then in service, the prototype (registration PP-ZTW) first flew on 29 April 1966. The Brazilian Air Force placed an initial order for 150 aircraft under the designation T-25 Universal, followed by an additional order of 28 aircraft in 1978.

Design

The T-25 is a cantilever, low-wing monoplane of all-metal construction featuring a retractable undercarriage and side-by-side seating for a crew of two to three. It is powered by a single 220 kW (300 hp) Lycoming IO-540-K1D5 six-cylinder horizontally-opposed air-cooled piston engine, driving a two-bladed Hartzell non-feathering constant speed propeller.

Armament

For weapons capability, the aircraft is equipped with two hardpoints capable of carrying 7.62 mm machine gun pods.

Operational History

The Brazilian Air Force operated the T-25 as both a basic trainer and a counter-insurgency aircraft. Although later replaced by the Tucano in advanced training and attack roles, the T-25 continues to serve as a primary and basic trainer at the Brazilian Air Force Academy (Academia da Força Aérea Brasileira). In export service, the Chilean Army ordered ten aircraft, which were later transferred to the Chilean Air Force. In 1983, Chile donated five of these aircraft to the Paraguayan Air Force. In 2005, the Brazilian Air Force donated six T-25s to the Paraguayan Air Force and another six to the Bolivian Air Force.

Variants

• T-25 Universal: The initial production variant operated by the Brazilian Air Force for primary training and counter-insurgency.
• YT-25B Universal II: An updated development variant that first flew on 22 October 1978 but did not enter production.