L-410

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Let L-410
Let L-410UVP-E of the Slovenian Armed Forces
Type	Airliner, transport aircraft
Manufacturer	Let Kunovice
Maiden flight	April 16 1969
Introduced	1970
Status	remain in service
Primary user	see lower

Development of the L-410 was started in the 1960's by the Czech Republic aircraft manufacturer Let Kunovice. The Soviet airline "Aeroflot" was looking for a turbine-powered replacement for the Antonov An-2 aircraft, initiating the design development by Let. After preliminary studies of an aircraft called the L-400, a new version was introduced called the L-410 Turbolet. The first prototype designated XL-410 flew on April 16, 1969. Because of delays in the development of a suitable Czech engine (Walter M 601), the prototype and first production version were powered by P&W PT6-A27 engines.

After M601 development was completed, the PT-6 engine was replaced by Walter M 601 engines coupled with Avia V508 three-blade propellers and the next variant was introduced, the L 410M.

A further version for Aeroflot was the L 410 UVP. This has improved performance in take-off and landing due to increased wing and tail area. However, due to an increased empty weight and a shift in the center of gravity, the aircraft had a decreased seating capacity of 15 passengers.

The L 410 UVP-E (the most common variant of the L 410) has increased maximum take-off weight to 6400 kg, M 601E engines with increased power, new five-blade propellers designated V 510 and the provision for wing tip tanks to increase fuel quantity. First flight was made in 1984, and production started in 1986.

The L-410 UVP-E9 and UVP-E20 are subversions which vary from each other only by minor changes arising from various certification regulations.The last L 410 family member is L 420 using the new engine variant M 601F.

The L 410 UVP-E aircraft is an unpressurized all-metal high-wing commuter aircraft, powered by 2 reverse-flow Walter M601 turboprop engines (2x560 kW take-off power) and Avia V 510 five-blade propellers. It is equipped with a retractable undercarriage. The aircraft uses two hydraulic circuits: main and emergency. The main electrical system operates with 28V DC. The de-icing system is leading edge pneumatic deicers and electrical heating of propellers, cockpit wind shields and pitotstatic system heads. Maximum take-off weight of the L 410 UVP-E is 6400 kg with the possibility of an increase to 6600 kg for the E9 and E20 variants, seating capacity 17 to 19. Cruise speed is 170 KIAS, maximum range about 770 nautical miles. The airplane is certified for IFR operation, CAT I ILS approach, and flights in icing conditions.

Of the more than 1,000 units built, roughly 500 remain in service. The majority were delivered to the former Soviet Union, but have been resold, particularly to airlines in Asia, Africa and South America. 40 aircraft are in use throughout Europe for commercial operation or skydiving. There are also an unknown number in Russia and Soviet breakaway states. The aircraft can be used with short or even unpaved runways.

Contents 1 Civilian Operators 2 Military Operators 3 Former Military Operators 4 Accidents 5 Specifications (L-410 UVP-E) 6 Maintenance and Service 7 References

[edit] Civilian Operators

In August 2006 a total of 313 L-410 aircraft remain in airline service. Major operators include: SEAir (10), Kazan Air Enterprize (13), Rovno Universal Avia (13) and Atlantic Airlines de Honduras (10). Some 111 other airlines operate smaller numbers of the type.^[1]

[edit] Military Operators

• Bulgaria
• Czech Republic
• Estonia (border guard),
• Hungary
• Latvia
• Libya
• Lithuania
• Russia
• Slovakia
• Slovenia
• Tunisia

[edit] Former Military Operators

• Czechoslovakia
• East Germany
• Soviet Union

[edit] Accidents

On March 31st 2006, an L-410 of the Brazilian Team airline went missing about 20 minutes after leaving the city of Macae. It crashed in a mountainous region east of Rio de Janeiro. All 17 passengers and two crew members on board were killed.

On September 10th 2001, an L-410 carrying 19 people, including Univ. of Washington Husky football fans, UW alumni and alumni association members crashed into the jungle in the Mexican state of Yucatan. All 19 people aboard, including 16 tourists and 3 flight crew members, were killed. More Information.

[edit] Specifications (L-410 UVP-E)

General characteristics

• Crew: 2 (pilot, copilot)
• Capacity: 19 passengers or 1.615 kg of load
• Length: 14.424 m ()
• Wingspan: 19.479 m ()
• Height: 5.829 m ()
• Wing area: 35.18 m² ()
• Empty weight: 3.725 kg ()
• Loaded weight: 5.800 kg ()
• Max takeoff weight: 6.600 kg ()
• Powerplant: 2× Walter M601E Turboprop engines, 560 kW () each

Performance

• Maximum speed: 388 km/h
• Cruise speed: 311 km/h
• Range: 1.040 km ()
• Service ceiling: 7.000 m ()
• Rate of climb: 468 m/min (90 m/min with one engine)

[edit] Maintenance and Service

Only known company in the USA providing parts, service and training to all Let-410 models and to the Walter M601 engines is Aviation Masters, Inc. located at Lake Worth, Florida, USA.

[edit] References

1. ^ Flight International, 3-9 October 2006