Antonov An-10

Antonov An-10
Company type	Passenger aircraft
Industry	Aviation
Founded	1957
Headquarters	Voronezh, Soviet Union
Products	Passenger aircraft

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The Antonov An-10 Ukraina (Ukrainian: Антонов Ан-10 Україна, lit. 'Ukraine'; known by NATO as Cat) is a Soviet-designed passenger aircraft featuring four turboprop engines.^[1]

Design and development

File:СССР-11185 Ан-10.jpg

Antonov An-10A

File:1958 CPA 2194.jpg

An-10 featured on a 1958 Soviet postage stamp

At the close of 1955, work commenced on a four-engine airliner intended for routes ranging from 500 to 2,000 kilometers (310 to 1,240 miles). Drawing inspiration from the Izdeliye N—the passenger adaptation of the Antonov An-8—the Antonov bureau designed the Izdeliye U ("U" signifying "Universal"), which retained a similar configuration to the An-8 but incorporated a larger size and a circular cross-section fuselage equipped with cabin pressurization.^[1] During initial development, engine options included the Kuznetsov NK-4 and the Ivchenko AI-20. Despite the NK-4's superior specifications, the Ivchenko AI-20 was ultimately selected, influenced partly by the Central Committee of the Communist Party of Ukraine’s preference for maximizing production within Ukraine, where Ivchenko’s manufacturing facility was located.^[1]

The prototype took to the air for its maiden flight on 7 March 1957, revealing issues with directional stability that necessitated a taller vertical stabilizer and later the addition of hexagonal auxiliary fins on the tailplane tips. Production began in 1957 at Zavod No.64 in Voronezh, with the first three units outfitted with Kuznetsov NK-4 engines due to delays in AI-20 availability. From 1958 onward, aircraft were equipped with Ivchenko AI-20A engines, which offered extended service life and performance comparable to their Kuznetsov counterparts.^[1] The model was publicly unveiled in July 1957, and after comprehensive testing concluded in June 1959, it received approval for mass production.^[1] Aeroflot launched commercial flights using the An-10 starting 22 July 1959 on the Moscow–Simferopol corridor.

The cabin accommodated 85 passengers and was noted for its spaciousness and well-appointed seating arrangements that provided generous legroom. However, due to a low floor height combined with a wide fuselage diameter, much of the internal volume remained unused, limiting baggage and cargo capacity. This inefficient utilization contributed significantly to a lower payload-to-takeoff weight ratio compared to contemporary aircraft like the Ilyushin Il-18, although it still surpassed that of the Tupolev Tu-104. Subsequent production variants, designated An-10A, addressed some of these inefficiencies by increasing seating capacity from 85 up to configurations offering 89, then 100 seats in different versions, eventually reaching between 117–118 and finally up to 132 by reducing seat pitch and modifying cabin layouts.^[1] Equipped with Ivchenko AI-20K engines, the An-10A exhibited enhanced performance and could carry a maximum payload of 14.5 tonnes (31,970 lb). The original hexagonal endplate fins were replaced by improved splayed ventral fins beneath the rear fuselage. These modifications enhanced directional stability as well as longitudinal stability during high-g maneuvers and landing approaches, while also postponing Mach buffet onset to approximately M0.702. However, since these ventral fins were situated in an area prone to flow separation, they induced undesirable vibrations. Following flight test outcomes and at least two fatal accidents, all remaining aircraft were retrofitted with an effective tailplane deicing system.^[1]

Operational history

File:An-10 CCCP-11213 (14237037554).jpg

Antonov An-10 displayed at the Central Air Force Museum

A total of 104 units were produced, including the prototype and static test models, with service entry in the Ukrainian Civil Aviation Directorate of Aeroflot commencing on 27 April 1959. The aircraft gained favor due to its spacious cargo capacity—particularly when seating was reduced—and its strong performance on short, undeveloped airstrips. Concurrently, the Antonov Design Bureau developed and manufactured the Antonov An-8 medium military transport, the An-10 as both a civilian airliner and military paratroop carrier, alongside the Antonov An-12 military cargo aircraft.

On 16 November 1959, the aircraft registered CCCP-11167 crashed during final approach near Lviv as a result of icing conditions.

An An-10A flown by A. Mitronin set a world record on 22 April 1962 by averaging a speed of 730.6 kilometres per hour (454.0 mph) over a 500 km closed circuit.

On 26 February 1960, another accident occurred at Lviv Danylo Halytskyi International Airport when CCCP-11180 crashed due to diminished longitudinal stability and control caused by tailplane icing.

The An-10 saw considerable military application, with 45 An-10TS models constructed for the VTA (Military Transport Aviation). Of these, 16 were operated solely by military units while the remaining 38 were loaned to the Ministry of Civil Aviation. Additionally, some flyable aircraft remained in use after Aeroflot retired the type.

On 18 May 1972, an An-10 crashed during descent to Kharkiv International Airport resulting in the deaths of eight crew members and 113 passengers. The subsequent investigation uncovered fatigue cracking in the wing center section stringers on numerous remaining aircraft. This incident prompted Aeroflot to withdraw all An-10s from service.

Following Aeroflot's retirement of the type on 27 August 1972, twenty-five well-maintained An-10A planes were transferred to the Soviet Air Force (VVS) and other Ministry of Aircraft Production units. These aircraft remained operational until their retirement by 1974. The last recorded flight of an An-10 took place in 1983.

Operators

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Variants

Izdeliye U – Internal designation for the four-engine passenger aircraft derived from the Izdeliye N An-8 design.
An-10 – Prototype and early production models powered by Kuznetsov NK-4 or Ivchenko AI-20A engines.
An-10A – Production variant introduced in December 1959 featuring increased seating capacity, reduced empty weight with enhanced payload capability, and equipped with Ivchenko AI-20K engines.
An-10AS – Several units converted for small-package cargo transport with removal of passenger seats.
An-10B (initial use) – Model upgraded with enhanced avionics and seating for up to 118 passengers.
An-10B (second use) – Modified An-10A configured to accommodate 132 passengers by increasing seats per row to seven and adding two extra rows in the mid-cabin. Front and middle cabin seats reclined for passenger comfort; tail structure was revised, and additional fuel tanks installed to extend range. Only one example built in 1962.
An-10D – Planned version designed for extended range up to 3,650 km (2,268 mi), featuring fuel tanks within wing torsion boxes and seating for 124 passengers. Engines were relocated 1 m (3 ft) outward; fiberglass propeller blades were introduced to reduce noise and improve efficiency. Prototype production was scheduled for 1960.
An-10KP – (Komandny Punkt – command post) A single aircraft (CCCP-11854) modified as an airborne command center stationed at Sperenberg Airfield, near Berlin in East Germany.
An-10TS – (Transport/Sanitarny – transport/ambulance) Forty-five units produced for VTA operations; thirty-eight were loaned to the Ministry of Civil Aviation.
An-10V (later designated An-16) – Lengthened An-10A by 6 m (20 ft) with a wider fuselage capable of carrying either 174 passengers over 1,600 km (990 mi) or 128 passengers over 3,000 km (1,900 mi). Development initiated in 1963 but never completed.
An-16 – Extended An-10 by 3 m (9.8 ft) to seat 130 passengers. Development began in 1957 but was canceled after plans shifted to another variant; no units were built.

Accidents and incidents

Throughout its operational history, the An-10 was involved in 15 accidents, resulting in 373 fatalities. During its service, the aircraft transported over 35 million passengers and carried approximately 1.2 million tons of freight.

On 29 April 1958, an An-10 (registration CCCP-Л7256) operated by MAP Voronezh AZ crashed at Pridacha Airport during a test flight after experiencing failure of two engines. Shortly after takeoff, engine number one overheated and ceased functioning due to prolonged operation at takeoff power. To counteract asymmetric thrust, the engine control system reduced power on engine number four. Subsequently, engine number three overheated and failed, leading to a reduction in power on engine number two. With only two engines operational, the aircraft was unable to maintain altitude, prompting the crew to attempt a forced landing with gear extended in a field; however, the plane crashed during this maneuver, resulting in one fatality among five crew members.
On 16 November 1959, Aeroflot Flight 315, an An-10 (CCCP-11167), entered a nosedive and crashed near Snilow Airport due to tail surface icing, killing all 40 passengers and crew. Investigations revealed that the An-10 was susceptible to icing conditions.
On 26 February 1960, another Aeroflot Flight 315, this time an An-10A (CCCP-11180), also experienced a nosedive while approaching Snilow Airport caused by tail icing. Although the crew initially regained control, the aircraft entered a second nosedive and crashed, resulting in 32 fatalities out of 33 onboard. Following this incident and the previous crash of CCCP-11167 in 1959, enhancements were made to the stabilizer ice protection systems, and pilots were restricted from selecting flap angles exceeding 15 degrees when icing conditions were known.
On 27 January 1962, an Aeroflot An-10 (CCCP-11148) crashed near Baratayevka Airport during a test flight after the number four propeller reversed unexpectedly. Thirteen of the fourteen occupants lost their lives.
On 28 July 1962, Aeroflot Flight 415, an An-10A (CCCP-11186), collided with a mountain located approximately 13 miles southeast of Adler/Sochi Airport while on approach due to air traffic control errors. All 81 people aboard perished.
On 8 February 1963, an Aeroflot An-10A (CCCP-11193) stalled and crashed near Syktyvkar during a training flight after three engines failed because of ice ingestion. The seven crew members onboard were killed.
On 8 August 1968, an Aeroflot An-10A (CCCP-11172) suffered a crash landing at Mirny Airport when the left main landing gear detached while being lowered; fortunately, there were no fatalities.
On 12 October 1969, an Aeroflot An-10 (CCCP-11169) encountered a trench after landing on a snow-covered runway at Mirny Airport; no casualties occurred.
On 15 May 1970, an Aeroflot An-10 (CCCP-11149) lost control and crashed at Kishinev (now Chișinău) during a two-engine go-around training exercise. All eleven crew members onboard died.
On 8 August 1970, Aeroflot Flight 888, an An-10A (CCCP-11188), made a forced landing in a field approximately 24 miles north of Kishinev Airport following an in-flight fire caused by an uncontained engine failure. One fatality occurred among the 114 occupants.
On 31 March 1971, Aeroflot Flight 1969, an An-10 (CCCP-11145), crashed on approach to Voroshilovgrad (now Luhansk) due to unexplained wing separation. All sixty-five onboard lost their lives.
On 12 October 1971, an Aeroflot An-10 (CCCP-11137) experienced landing gear collapse upon touchdown at Kishinev; no injuries were reported.
In February 1972, an Aeroflot An-10 (CCCP-11142) was destroyed by fire at ARZ-412 located at Rostov Airport.
On 30 April 1972, an Aeroflot An-10 (CCCP-11159) sustained significant damage following a heavy landing at Vnukovo Airport; fortunately, there were no casualties.
On 18 May 1972, Aeroflot Flight 1491, operating an An-10A (CCCP-11215), crashed while approaching Kharkov Airport after both wings detached due to fatigue failure in the center wing panel. The accident claimed all 122 lives onboard. Following this tragedy, Aeroflot withdrew the An-10 from service.

Specifications (An-10A)

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References

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External links

AirDisaster.Com Accident Database – Antonov AN-10

Template:Antonov aircraft

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