Let L-610 Turbolet

Let L-610 Turbolet

The L-610 was to become a follower of the ever-successful 410 series engine. His study and model of a twin-engine variant was introduced in 1981. This engine also developed the new M-602 engine, V518 low-speed five-stroke propeller, SAFIR auxiliary power units (engine starting, ground air conditioning and emergency power source) and 200 other aggregates to provide different functions of aircraft systems.

However, since the initial development of new Walter M-602 engines was expected, the four-cylinder variant of the airplane was also considered. This modification was supposed to be equipped with an older but tried-and-tested Walter M-601 engine. However, in 1985, this idea was finally abandoned and the development team continued on the original draft of the twin-engine version. Extensive tests of individual systems performed in the US and then in the USSR were tested on several differently modified aircraft.

For example, the Avia Av-14 fuselage was used as a functional model for testing the electrical system, the navigation system was verified on the L-410 UVP-E and the IL-18LL flying laboratory was again produced for testing the drive unit. The first take-off of the L-610 prototype took place on 28. December 1988, and a short documentary entitled Six Degrees of Freedom was filmed for this success. By the mid-1990s, three more flying machines and two specimens designed for breaking and fatigue tests were produced. In 1992, two prototypes of the “western” L610G prototype with proven General Electric CT7-9D engines and Hamilton Standart HS 14 RF-23 four-stroke propellers were created. Negotiations with GE also led to a change to the designation of the Czech-powered aircraft, which were later referred to as the L-610M.

After the change of the owner of the American company Ayres Corporation Inc., the Ayres 7000 was also used for the machine. The last, sixth flying prototype of the L-610, which complied with the requirements of the US FAR 25, flew in May 1997. In 2004 the new owner of the company decided to continue only in the production of the L-410 and finally end the L-610. The planned anti-submarine version, known as the L-610MPA, which was based on the L-610G, has never been done. In 2006, only the remaining manufacturing products and aircrafts had been dismantled and destroyed.

Fortunately, a few exhibits have been saved. One complete machine with OK-134 matriculation, two hulls and a wing of the machine is exhibited by the Kunovice Air Museum. The next and last complete airplane OK-024 is issued by the Olomouc Air Museum. Even though this aircraft never got into production, it has become the largest transport and transport aircraft in our country designed for regional transport. At the same time, it was also the first airplane with a pressurized cabin and integral fuel tanks.




  • L-610
  • L-610G
  • L-610M
  • L-610MPA
Manufacturer Let Kunovice (now Aircraft Industries a.s.)
Crew 2 pilots
  • 40 passengers or
  • 6 Aircraft Containers or
  • 16 passengers and 3 air containers
Airplane type Highway
  • 2 x Walter M-602 or
  • 2 x General Electric CT7-9D
Engine power
  • 2 x 1360 kW or
  • 2 x 1446 kW
  • travel 438 km/h
  • maximum 490 km/h
Length 21,72 m
Span 25,60 m
Height 8,19 m
Wing area 56 m²
  • empty 9 230 kg
  • takeoff 9 730 kg
Available 8 950 m
Flying range 2 440 km