The Utva-65 Privrednik (Merchant) is a Yugoslav civil aircraft designed and used for agricultural work.

Design and development

The Utva-65 was designed specifically as an agricultural aircraft. It was a single-seat, low-wing braced monoplane with a single engine. The wings were essentially identical to those of the high-wing

UTVA-60 The UTVA-60 is a Yugoslavian light aircraft of the 1960s. First flying in 1959, it was built by UTVA for both the Yugoslavian armed forces and for civilian use. Development and design In 1959 the Yugoslav aircraft company UTVA designed and built a ...

apart from the

wing root The wing root is the part of the wing on a fixed-wing aircraft or winged-spaceship that is closest to the fuselage The fuselage (; from the French ''fuselé'' "spindle-shaped") is an aircraft's main body section. It holds crew, passengers, o ...

s, which were extended and strengthened so that the chord was greater and the wingspan increased by These wings were of single-spar, all-metal construction, carrying ailerons that linked to the flaps, drooping 15 degrees when the flaps were set to 40 degrees. A single streamlined strut ran from the upper fuselage to mid-wing on either side, with minor struts from them to the wing at about one-quarter span. The conventional all-metal tail surfaces were also from the UTVA-60, but had increased

elevator An elevator or lift is a cable-assisted, hydraulic cylinder-assisted, or roller-track assisted machine that vertically transports people or freight between floors, levels, or decks of a building, vessel, or other structure. They a ...

area. The fuselage of the Utva-65 had a steel-tube structure, with metal skinning forward and below and fabric elsewhere. The single-seat pilot's cockpit was high and behind the trailing edge; combined with all-round glazing, this gave a good view and also increased fuselage space. There was a hopper for fertilizer, spray, etc. ahead of the cockpit. Standard spray bars could be fitted under the trailing edge. The undercarriage was of the conventional tailwheel kind, with cantilever main legs angling outwards from the wing root. At launch there were three choices of

engine An engine or motor is a machine designed to convert one or more forms of energy into mechanical energy. Available energy sources include potential energy (e.g. energy of the Earth's gravitational field as exploited in hydroelectric power ...

, all Lycoming six-cylinder

horizontally-opposed A flat engine is a piston engine where the cylinders are located on either side of a central crankshaft. Flat engines are also known as horizontally opposed engines, however this is distinct from the less common opposed-piston engine design, wh ...

air-cooled Air-cooled engines rely on the circulation of air directly over heat dissipation fins or hot areas of the engine to cool them in order to keep the engine within operating temperatures. In all combustion engines, a great percentage of the heat ge ...

types. The GO-480-B1A6 produced 270 hp (200 kW), the geared GO-480-G1A6 290 hp (216 kW), and the IGO-540-B1A 350 hp (260 kW). A later variant of the Utva-65, the Utva-67 (first flown in 1967), was similar, but had the eight-cylinder, 400hp (298 kW) Lycoming IO-720-A1A and a revised fuselage of greater capacity. Its top speed was .

Operational history

The Utva-65 was used in Yugoslavia by agricultural cooperatives for pesticide application and

mosquito control Mosquito control manages the population of mosquitoes to reduce their damage to human health, economies, and enjoyment. Mosquito control is a vital public-health practice throughout the world and especially in the tropics because mosquitoes spr ...

. The

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n airline Societé de Travail Aérien began operations in October 1968 using five Utva-65 aircraft for similar work.

Variants

;Utva-65 Privrednik-GO :Variant with a 295 hp (220 kW) Lycoming GO-480-G1A6. ;Utva-65 Privrednik-IO :Alternate variant with a 300 hp (224 kW) Lycoming IO-540-K1A5. ;Utva-65 Super Privrednik-350 :1973 variant with a 350 hp (261 kW) Lycoming IO-540-A1C engine.

Operators

; ;

Aircraft on display

;Serbia *

Museum of Aviation (Belgrade) The Aeronautical Museum Belgrade, formerly known as the Yugoslav Aeronautical Museum, is a museum located in Surčin, Belgrade, the capital of Serbia. Founded in 1957, the museum is located adjacent to Belgrade Nikola Tesla Airport. The current f ...

in Belgrade A Utva-65 S is on display

Specifications (Lycoming IGO-540-B1A)

References

Notes

Bibliography

* * * *Branislav Nikolić, ''Na sopstvenim krilima'', Štamparija Topalović, Valjevo,2009., {{DEFAULTSORT:Utva 65 UTVA aircraft, 65 1960s Yugoslav agricultural aircraft Low-wing aircraft Single-engined tractor aircraft Aircraft first flown in 1965