# Aircraft Industries

Aircraft Industries, a.s., operating as Let, is a Czech (before December 1992 Czechoslovak) civil aircraft manufacturer. Its most successful design has been the L-410 Turbolet, of which more than 1300 units have been built. Its head office is in Kunovice, Zlín Region. Let was owned by the Russian company UGMK from 2008 to 2022, when it was acquired by Czech-based Omnipol Group.
The company operates the sixth largest Czech airport and a private secondary school.

## History

Building of an aircraft factory in Kunovice started in 1936, as a part of the Škoda Works industrial concern. Before and during World War II the unfinished plant served only as a repair works. After the end of the war the factory was nationalized and in 1950–53 a new plant was built. In 1957–1967 it was named SPP (Strojírny první pětiletky – "Works of the First Five-year Plan"), and in 1967 it returned to the name LET. The works produced under licence were the Soviet trainers Yakovlev Yak-11 (under a designation C-11) and the Aero Ae 45 and Aero Ae 145 utility aircraft.
In 1957 the company began to develop the L-200 Morava light utility aircraft and four years later the Z-37 Cmelak agricultural aircraft, which were both a commercial success.
Over the years Let developed and produced gliders: Zlín 22, Z-124 Galánka, LF-109 Pionýr, and Z-425 Šohaj. However the most popular gliders produced by LET are the Blaníks: L-13 Blaník, L-23 Super Blaník and L-33 Solo.
During the 1960s Let's engineers developed a 19-seat commuter turboprop, the L-410 Turbolet, of which more than 1200 were produced. This popular aircraft went through a number of improvements and modernisations and the latest types, the L 410 UVP-E20 and L 420 are EASA and FAA certified respectively.
The largest Czech transport aircraft, the Let L-610, was produced in 1988 in prototype form and displayed at the Paris Airshow. Production was cancelled due to lack of funding. There were eight prototypes made in the factory.
The all-metal Blaník sailplane was produced in the largest quantities of any sailplane, with over 3,000 manufactured since the first rolled off the production line in 1958. In 2005 it was still in production as the L23 Super Blaník variant.
The company explored the possibility of a joint venture with Fairchild Aircraft in the 1990s, but eventually decided against it. However, it was later purchased by Ayres Corporation in 1998. In 2001, it merged with Morovan Aeroplanes. Following bankruptcy, it was purchased by Aircraft Industries in 2005.
The Ural Mining and Metallurgical Company (UGMK) purchased 51% of the company's shares was in 2008; UAC had shown interest in acquiring the control of the company as well. UGMK purchased the remaining shares in 2013.
In April 2022, Aircraft Industries was acquired by the Prague-based company, Omnipol Group.

## Products
### Powered aircraft

| Model name | First flight | Number built | Type |
| Let Ae-45S | | 228 | Twin engine utility airplane; Aero Ae-45S built under license |
| Let Ae-145 | | 162 | Twin engine utility airplane; Aero Ae-145 built under license |
| Let C-11 | | 707 | Single engine trainer; Yakovlev Yak-11 built under license |
| Let E-33 | | | An L-200 converted into a testbed for tails and boundary layer control |
| Let L-18 | | | 1955 twin-boom light-transport aircraft project |
| Let L-36 | | | Low-wing agricultural aircraft project; abandoned for Zlin Z-37 |
| Let L-110 | | | 1995 four-seat, all-metal low-wing light/touring monoplane project |
| Let L-145 | | | Original designation for Ae-45S |
| Let L-200 Morava | 1957 | 361 | Twin engine utility airplane |
| Let L-210 | 1966 | 1 | Six seat version of L-200 with M338 engines |
| Let L-300 | | | Enlarged air taxi version of L-200 with 9-11 seats; only a project (1958) |
| Let L-400 | | | 1960s turboprop feederliner project; resembled a scaled-down An-24 |
| Let L-410 Turbolet | 1969 | 1,200+ | Twin engine regional airliner |
| Aircraft Industries L 410 NG | 2015 | | Upgraded version of the L-410UVP-E20 |
| Let L-420 (I) | | | 1960s commuterliner project; predecessor of L-410 |
| Let L-420 (II) | | | 1980s projected cargo freighter version of L-410 |
| Let L-420 | | | Westernized variant of L-410; upgraded L-410UVP-E |
| Let L-430 | | | 1990s projected stretched L-410 development |
| Let L-450 | | | 1990s projected L-410 replacement; redesignated L-510 |
| Let L-500 | | | 1962 light aircraft studies |
| Let L-510 (I) | | | 1965 low-wing two-seat trainer project |
| Let L-510 (II) | 1966 | 1 | 1992 twin turboprop commuterliner project; intended as L-410 replacement |
| Let L-520 | | | 1960s low-wing four-seat tourer project; higher performance version of L-510 |
| Let L-539 | | | Single-engine business jet project; based on Aero L-39 |
| Let L-540 | | | 1965 low-wing four-seat tourer project |
| Let L-542 | | | 1960s twin-engine light aircraft project |
| Let L-550 | | | 1965 low-wing four-seat tourer; economy model of L-540 |
| Let L-600 | | | 1964 twinjet feederliner project; intended as Li-2 replacement |
| Let L-610 | 1988 | 6 | Prototype twin engine transport airplane |
| Let L-614 | | | 1982 projected four-engine version of L-610 |
| Let L-710 | | | 1993 "Boxplane" freighter based on L-610G parts |
| Let L-1000 | | | 1963 Smaragd (Emerald) jetliner project |

### Gliders

| Model name | First flight | Number built | Type |
| Let L-13 Blaník | 1956 | 3,000+ | Two-seat, high-wing all-metal glider |
| Let L-21 Spartak | 1958 | | High-wing, single-seat sailplane |
| Let L-23 Super Blaník | 1988 | | L-13 derivative with two-piece canopy and T-tail |
| Let L-33 Solo | 1992 | 94 | Single-seat sailplane |
| Let L-113 | | | 1957 projected simplified version of L-13 |
| Let L-213 | | | 1957 projected long-span version of L-13 |
| Let LF-106 | | | 1940s single-seat training glider project; redesignated as LF-109 |
| Let LF-109 Pionýr | 1950 | ~470 | Single-seat training glider |
| Let LF-110 | | | 1950s two-seat high-wing sailplane project; mixed construction counterpart to L-13 |
| Let LF-113 | | | two-seat high-wing sailplane project |
| Let LF-114 Standard | 1956 | | Single-seat training glider |
| Let LF-209 | | | 1952 two-seat high-wing sailplane project |
| Let LF-309 | | | Two-seat high-wing sailplane; as LF-209 but with longer span |
| Let LF-409 | | | Two-seat training glider; LF-109 fuselage with a new wing |
| Let LF-509 | | | Two-seat high-wing sailplane; as LF-209 but with trapezoidal wings |
| Let LP-110 | | | 1953 two-seat high-wing glider project; all-metal counterpart to L-13 |
| Let TG-10 | 2002 | 21 | US military designation for L-13, L-23 and L-33 gliders |