Neiva T-25 Universal — History, Specs & Stories

T-25
Aircraft Museum · Trainer · T-25

Neiva T-25 Universal
Brazil’s Classroom in the Sky

Designed by a Hungarian glider pilot in São Paulo, the Universal has taught Brazilian Air Force cadets to fly for more than half a century and is now being upgraded to fly on.

1966First flight
c.180Aircraft built
4Air forces
55+Years in FAB service
Photo: MARCO AURÉLIO ESPARZ… / CC BY-SA 3.0 via Wikimedia Commons
RolePrimary and basic military trainerEra1970s to presentEngineLycoming IO-540-K1D5 six-cylinder piston, 300 hpOriginBrazil · Neiva, later EmbraerStatusIn serviceWant to fly a real military jet?

The Story

The T-25 Universal: how Brazil learned to build its own trainer

In the early 1960s the Força Aérea Brasileira (FAB) was still training its cadets on wartime designs: the North American T-6 Texan and the Fokker S-11 and S-12. In 1963 the small firm Sociedade Construtora Aeronáutica Neiva, best known for gliders and the Paulistinha light aircraft, answered the call for a replacement. Its designer was Joseph Kovács, a Hungarian engineer and glider pilot who had arrived in Brazil in 1948 at the age of 23. His Universal was Neiva’s leap from wood and fabric to all-metal construction: a sturdy low-wing monoplane with retractable tricycle gear, a 300 hp Lycoming six-cylinder engine and, unusually for a military trainer, side-by-side seating so that instructor and student could see each other’s every move.

The prototype, registered PP-ZTW, flew on 29 April 1966. In December 1967 the FAB ordered 150, built at São José dos Campos, and the first production aircraft, considerably modified to military requirements, reached the air force in 1971 as the T-25. A further 28 were ordered in 1978; total production is commonly given as about 180, though counts vary. The Universal took over the cadets’ basic course at the Academia da Força Aérea at Pirassununga, and armed versions with gun pods trained pilots in counter-insurgency work. In 1980 it even carried the reborn Esquadrilha da Fumaça display team back into the sky, flown by academy instructors in about 55 displays before the team moved on to the Tucano.

The Universal did more than teach pilots. It taught Brazil to build aircraft in series, and its designer went on to shape the Embraer EMB-312 Tucano after joining Embraer in 1973; Neiva itself became an Embraer subsidiary in 1980. Second-hand T-25s served in Chile, Paraguay and Bolivia, and operational FAB squadrons used the type for liaison and continuation flying. Yet the most remarkable fact is endurance. More than fifty years after delivery, the T-25 still gives FAB cadets their first military flying hours, and in December 2024 the first T-25M, rebuilt with a modern cockpit, flew at Lagoa Santa to keep the fleet going for years to come, with the first four handed to the academy a year later.

Two seats side by side, one engine, and half a century of Brazilian air force pilots.The Universal — still teaching cadets
01The T-25’s designer: Joseph Kovács, from Budapest gliders to the Tucano

Joseph Kovács learned to fly gliders in Hungary at 15, launched off hillsides by rubber bungee. After the Second World War there was no flying to be had at home. As he later put it in a Brazilian gliding federation profile, “The first thing taken from a war loser is aviation. In Hungary we couldn’t even fly gliders.” He trained as an industrial engineer in Budapest and in 1948 arrived in Brazil, aged 23.

He worked first at São Paulo’s Technological Research Institute and from 1952 at the Aeronautical Technical Centre, the CTA, before joining Neiva in 1960. There he designed the Universal and the Regente liaison aircraft, each built in substantial numbers for the FAB. The Universal showed his priorities: structural toughness, straightforward handling and easy maintenance for a fleet that would be flown hard by students.

In 1973 Kovács moved to Embraer, where he led the design of the T-27 Tucano, the turboprop trainer with tandem ejection seats that would sell to air forces around the world and replace the T-25 in the advanced stages of FAB training. He was made a Commander of Brazilian Aviation in 2014 and died on 14 July 2019. Few designers can claim to have created both the trainer a nation’s cadets start on and the one they progress to.

Design & Engineering

What makes the T-25 Universal special

01

Side by side, not tandem

Most military trainers seat instructor and student one behind the other, mimicking a fighter cockpit. The T-25 seats them side by side. For a cadet’s first hours that is a teaching advantage: the instructor can see the student’s hands, scan and reactions directly and demonstrate at the next seat. Accounts of training at Pirassununga describe the layout as ideal for instructor and cadet. The trade-off is a wider fuselage and less of a fighter feel, which the FAB supplies later, when cadets move on to the tandem Tucano.

02

A big engine for a basic trainer

The Universal was conceived as an advanced trainer to replace the 600 hp T-6, so Neiva gave it a 300 hp Lycoming IO-540 fuel-injected six-cylinder and a two-bladed constant-speed Hartzell propeller. The result is a heavy, solid aircraft for its class, with a maximum take-off weight of about 1,700 kg, a top speed around 300 km/h and enough endurance, roughly three and a half hours, for long navigation exercises. The engine is a standard civil type, which has helped keep the fleet supportable for decades.

03

Built to be flown hard

The T-25 is an all-metal low-wing monoplane with retractable tricycle undercarriage and a simple, robust structure. At the Academia da Força Aérea cadets fly about 40 hours on it in their second year, covering basic manoeuvres, aerobatics, formation and navigation, before moving to the Tucano. Aviation News Journal’s account of academy training notes that its basic design makes it ideal for initial training and simplifies maintenance, which goes a long way to explaining why it has outlasted several of its own intended successors.

02The T-25’s variants: from Universal to T-25M
  • XT-25 (IPD-6201): the prototype PP-ZTW, first flown on 29 April 1966 and now preserved at the Museu Aeroespacial in Rio de Janeiro.
  • T-25 / T-25A: the production basic trainer delivered to the FAB from 1971.
  • AT-25: armed version with two underwing hardpoints for 7.62 mm machine-gun pods, used to train pilots in counter-insurgency tactics.
  • T-25C: later-standard aircraft, used both at the academy and by operational squadrons for liaison and continuation flying.
  • YT-25B Universal II: a more powerful development first flown on 22 October 1978; it did not enter production.
  • T-25M: modernisation by the Parque de Material Aeronáutico de Lagoa Santa, first flown on 5 December 2024, with GNSS navigation, terrain awareness and warning, new wiring and a redesigned panel some 50 kg lighter; 38 aircraft are planned, drawn from the T-25A and T-25C fleets, with the first four delivered to the academy in December 2025.
Technical Data

Neiva T-25 Universal specifications

Specifications

Crew
2 (side by side)
Length
8.60 m (28 ft 3 in)
Wingspan
11.00 m (36 ft 1 in)
Height
3.00 m (9 ft 10 in)
Wing area
17.20 m² (185.1 sq ft)
Empty weight
1,150 kg (2,535 lb)
Max take-off weight
1,700 kg (3,748 lb)
Powerplant
1 × Lycoming IO-540-K1D5 six-cylinder piston, 300 hp (224 kW), two-bladed Hartzell constant-speed propeller
Maximum speed
about 300 km/h (186 mph; 162 kn)
Cruise speed
about 280 km/h (174 mph; 151 kn)
Range
1,500 km (932 mi), about 3.5 hours
Service ceiling
commonly given as 6,100 m (20,000 ft); some sources quote 5,000 m (16,400 ft)
Climb rate
6.66 m/s (1,312 ft/min)
Armament
AT-25: two underwing hardpoints for 7.62 mm machine-gun pods

Costs & production

Cost per flight hour
Our estimate: roughly US$300 to 600, based on the fuel burn and maintenance of a 300 hp six-cylinder Lycoming and the operating costs of comparable civil aircraft
Production
About 180 (150 ordered in 1967, 28 more in 1978); published totals range from 135 delivered to 189 built
Programme
T-25M modernisation of 38 aircraft at Lagoa Santa; first flight 5 December 2024, first four delivered to the academy in December 2025
03The T-25’s operating costs: why Brazil keeps rebuilding it

The T-25 costs what a heavy civil single costs to run: avgas for a 300 hp Lycoming, routine piston maintenance and a simple metal airframe. The FAB does not publish an hourly figure, so the range given is an estimate based on comparable aircraft.

That economy is why the air force chose to modernise rather than replace. The T-25M programme keeps the proven airframe and engine but replaces analogue instruments and ageing wiring, adds satellite navigation and terrain warning, and saves around 50 kg. It is carried out in-house at the Parque de Material Aeronáutico de Lagoa Santa, and the first four upgraded aircraft reached the academy in December 2025.

The arithmetic also reflects how the FAB trains. The T-25 is the aircraft on which a cadet makes mistakes: hard landings, botched spins, rough formation. A simple piston airframe tolerates that treatment, and repairs are cheap. Expensive turbine hours are saved for the Tucano, later in the course, once the cadet has the basics. Simulators now take some of the load too, but the T-25 remains the academy’s first real aircraft.

Timeline

The T-25 Universal from 1963 to the T-25M

1963

A replacement for the T-6

Neiva begins designing a trainer to replace the FAB’s T-6 Texans and Fokker S-11 and S-12s.

1966

First flight

The prototype PP-ZTW flies on 29 April.

1967

Order for 150

In December the FAB contracts Neiva for 150 aircraft, to be built at São José dos Campos.

1971

Into service

The first production T-25 is delivered to the FAB, much modified from the prototype.

1978

More aircraft, and a Universal II

The FAB orders 28 more; the YT-25B Universal II flies on 22 October but is not produced.

1980

Fumaça reborn; Embraer takes over

Academy instructors give the first T-25 display of the revived smoke team on 10 July; Embraer acquires Neiva.

1983

Tucano takes the display role

After about 55 displays on the T-25, the team receives its first T-27 Tucanos and debuts them in December.

2005

Hand-me-downs abroad

Second-hand T-25s go to Paraguay and Bolivia, joining a type also flown in Chile.

2019

Designer dies

Joseph Kovács, creator of the Universal and the Tucano, dies on 14 July.

2024

T-25M flies

The first modernised T-25M makes its maiden flight at Lagoa Santa on 5 December.

2025

Back to the academy

The first four T-25Ms are delivered to the Academia da Força Aérea in December.

Stories & Eyewitnesses

Stories & eyewitnesses: the T-25 Universal at work

People

The glider pilot from Budapest

The man who designed the T-25 came to Brazil because his own country had grounded him.

Read the full story
Joseph Kovács started flying gliders at 15. After the war Hungary was barred from aviation, and in 1948, aged 23, he arrived in Brazil. His explanation, recorded by the Brazilian gliding community, was simple: “The first thing taken from a war loser is aviation.” He worked at the CTA before joining Neiva in 1960, where the Universal became his first major military design. A founder of the Brazilian Gliding Federation, he later designed the Tucano at Embraer and died in 2019.
Survivor

PP-ZTW, the first Universal

The prototype that started it all is on show in Rio de Janeiro.

Read the full story
The prototype, built as IPD-6201 with the experimental registration PP-ZTW, first flew on 29 April 1966. It later took the FAB serial 1830 as the XT-25 and is now preserved at the Museu Aeroespacial at Campo dos Afonsos in Rio de Janeiro. Designed to replace the T-6 Texan and the Fokker S-11 and S-12, it represented a generational jump for Brazilian training. Visitors can compare it with photographs of service T-25s and see how far the production T-25 departed from the prototype: the air force asked for substantial changes before the first deliveries in 1971.
Industry

From gliders to metal

The Universal turned a glider builder into a military supplier.

Read the full story
Neiva was founded by José Carlos de Barros Neiva and began by building gliders in Rio de Janeiro before taking on the Paulistinha light aircraft. The Universal was its leap to all-metal construction and to large-scale military production, with a 150-aircraft contract signed in December 1967. The experience, and the Regente liaison aircraft built alongside it, made Neiva valuable enough that Embraer acquired the company in 1980. Brazil’s aircraft industry had, in effect, learned series production of military aircraft on the Universal.
Training

Forty hours in the second year

At Pirassununga the T-25 is where a cadet becomes a pilot.

Read the full story
At the Academia da Força Aérea in Pirassununga, the T-25 is flown by the 2º Esquadrão de Instrução Aérea. Cadets fly roughly 40 hours on it in their second year, learning basic handling, aerobatics, formation and navigation, with the instructor alongside rather than behind. In their fourth year they move on to the Tucano for about 90 more hours. For half a century, almost every FAB pilot has passed through this sequence, beginning in a T-25, on the 1,902 m runway of the academy’s east sector.
Display

The instructors who brought back the smoke

In 1980 a group of T-25 instructors revived Brazil’s famous display team.

Read the full story
The Esquadrilha da Fumaça had flown T-6s and Magisters until it was stood down in 1976. Four years later, instructors at the academy began flying formation aerobatics in T-25s, and on 10 July 1980 they gave their first demonstration, at a ceremony where cadets received their insignia. Brazilian accounts credit the T-25 group with about 55 displays. The team was formally re-established as the Esquadrão de Demonstração Aérea on 21 October 1982, still flying the T-25 until the Tucano arrived.
Display

Handing the smoke to the Tucano

The T-25 passed the display baton to an aircraft by its own designer.

Read the full story
In September 1983 the reformed display team received its first six T-27 Tucanos and debuted them that December. The new aircraft was faster, turbine-powered and had tandem ejection seats, and it went on to carry the team to its first international appearance in Chile in 1984. The irony was neat: both the aircraft that revived the team and the one that replaced it came from the drawing board of Joseph Kovács, who had moved from Neiva to Embraer a decade earlier.
Training

Gun pods for counter-insurgency

The basic trainer also taught Brazilian pilots to attack.

Read the full story
Neiva gave the Universal two wing pylons, and in its armed AT-25 form it carried 7.62 mm machine-gun pods. The FAB used these aircraft to train pilots in counter-insurgency tactics during the 1970s, when light, cheap armed trainers were seen as the right tool for the job across Latin America. Some T-25s also served with operational squadrons, including units at Natal and Afonsos. The attack-training role passed to the Tucano in the 1980s, leaving the T-25 to concentrate on primary and basic training at the academy. There is no record of the type being used in combat.
Export

Across the borders

T-25s found second careers with Brazil’s neighbours.

Read the full story
The Chilean Army ordered a small batch of Universals in the 1970s, which later passed to the Chilean Air Force; sources give six or ten aircraft. Chile in turn handed five to Paraguay in 1983, and more second-hand T-25s reached Paraguay and Bolivia around 2005. The numbers were small, but they made the Universal a familiar sight on South American training fields well beyond Brazil, and in Paraguay it joined a training fleet that later added the Chilean-built Pillán.
Upgrade

The T-25M takes off

Rather than retire its veteran, the FAB rebuilt it.

Read the full story
On 5 December 2024 the first T-25M, construction number 050, made its maiden flight at the Parque de Material Aeronáutico de Lagoa Santa. The programme replaces the analogue panel with modern instruments including satellite navigation and a terrain awareness and warning system, rewires the aircraft completely and saves about 50 kg. Thirty-eight T-25A and T-25C airframes, some of them flying for more than fifty years, are to be converted, with testing continuing into 2026. Around 45 airframes were thought eligible.
Training

Fifty-four years on

In December 2025 the academy received its first modernised Universals.

Read the full story
The first four upgraded T-25Ms were handed over to the Academia da Força Aérea in December 2025, more than fifty years after the type first entered FAB service. Modern glass-style instruments now sit in an airframe designed in 1963, and the cadets who fly them will be learning to navigate with satellite systems that did not exist when the first T-25s were delivered. Few military trainers anywhere have served one air force so long in the same job, and the upgrade is intended to keep the type in the classroom for years more.
Gallery

The T-25 in pictures

T-25
T-25Photo: MARCO AURÉLIO ESPARZ… / CC BY-SA 3.0 via Wikimedia Commons
Operations

Where the T-25 flies and flew

Service Record

The T-25 Universal’s record

The T-25 has no combat record. Its armed AT-25 form trained pilots for counter-insurgency in the 1970s, but the type’s real legacy is in training: it has given generations of Brazilian Air Force cadets their first military flying, revived the Esquadrilha da Fumaça, and outlasted its own successors at the academy.

c.40 hFlown by each cadet in the second year
55Displays with the Fumaça, 1980 to 1983 (approx.)
38Aircraft planned for T-25M upgrade

See how training and combat types compare in the military aircraft statistics database. Figures are approximate.

Questions & Answers

Everything people ask about the T-25

Can I fly in a Neiva T-25 Universal?
MiGFlug does not offer flights in the T-25 Universal, which remains in Brazilian military service, but you can fly several genuine military jets today, from the L-39 Albatros to the MiG-21, see MiGFlug’s jet flights.
Who designed the T-25 Universal?
Joseph Kovács, a Hungarian-born engineer working for Neiva, who later designed the Embraer EMB-312 Tucano.
Is the T-25 still in service?
Yes. It remains the basic trainer at Brazil’s Air Force Academy in Pirassununga, and 38 aircraft are being modernised to T-25M standard.
Why does the T-25 have side-by-side seats?
Side-by-side seating lets the instructor watch and help the student directly, which suits a cadet’s first flying hours.
How many T-25s were built?
About 180. The FAB ordered 150 in 1967 and 28 more in 1978; published totals vary between sources.
Did the T-25 fly with the Esquadrilha da Fumaça?
Yes. Academy instructors flying T-25s revived the team in 1980 before it converted to the Tucano in 1983.
Was the T-25 armed?
The AT-25 version could carry two 7.62 mm machine-gun pods and was used to train pilots in counter-insurgency tactics, but it never saw combat.
The part of the museum you can fly

You can’t fly the T-25.
These, you can.

Most of this museum you can only look at. These genuine military jets you can fly yourself with MiGFlug — with aerobatics and time on the controls.

See all jet flights

Related Aircraft

Continue the tour

The SuccessorEmbraer EMB-312 TucanoKovács’s turboprop follow-on, which took over advanced training and the Fumaça display role.Read the Embraer EMB-312 Tucano storyThe Family LineEmbraer A-29 Super TucanoThe armed descendant of the Tucano line that began with Neiva’s trainer.Read the Embraer A-29 Super Tucano storyThe RivalSIAI-Marchetti SF-260Italy’s piston trainer, competing for the same air forces in the same era.Read the SIAI-Marchetti SF-260 story
Sources & Further Reading

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