Thursday 28 November 2013

Ayres Let L 610 Regional Airliner

Ayres Let L 610 Regional Airliner :



Introduction :

Regional airliner. In service since 1991 (L-610G/AYRES 700 since 1999). Stretched development of L-410 as 40 seat commuter airliner for AEROFLOT (L-610M) only a small number delivered. Improved west market version L-610G with CT7 turbofans and EFIS avionics. Provisional customer is Czech airline CSA. Development continued, since 2000 as AYRES 700. AYRES is owner of LET since 1998.

History :

The Let L 610 is a stretched development of the earlier L 410, and although originally designed for a Soviet requirement, in its westernised form is now marketed worldwide. The L 610 was conceived in the mid 1980s to meet a Soviet Union requirement for a new 40 seat turboprop airliner. A production run of 500 was envisaged for primary customer Aeroflot, and the L 610's design was optimised to suit that carrier's requirements (including operations from austere airfields). The basic L 610M for Aeroflot is a stretched 40 seat development of the L 410 powered by two 1358kW (1822shp) Motorlet M 602 turboprops. It first flew on December 28 1988, and a small number were delivered to Aeroflot during 1991 before Let suspended deliveries, stating that they would not resume unless western currency was used for payment.

As a result of the dissolution of the Soviet Union and the collapse of communism throughout eastern Europe, Let began development of a westernised version intended to significantly widen the type's sales appeal. Known as the L 610G, it is optimised for world markets and features General Electric CT7 turboprops, Collins Pro Line II digital EFIS avionics, Collins weather radar and autopilot. First flight of the L 610G prototype occurred on December 18 1992 (four years after the L 610M), and, after some delays, US FAA certification is planned for 1999.






Let has high hopes that the L 610 will penetrate the very crowded, international market for 40 seat airliners and the Czech Republic's lower labour costs should see the aircraft priced competitively compared to its western competitors. No doubt, sales interest will increase once western certification is awarded, while new Let owner Ayres is keen to develop the L610 further and exploit its potential.


Studies began in 1983 of a 40-seat pressurised development of the L-410 feederliner powered by two newly developed Walter M-602 turboprop engines driving five-bladed 'quiet' propellers. Prototype construction of this L-610 began early in 1988 and the first of three flying prototypes was rolled out in November. The first flight took place on 28 December 1988, and the type was exhibited at the Paris air show in June 1989. The first of 600 aircraft for Aeroflot was shown at the Paris air show in June 1991, and others are on order for CSA. Current activities centre around the completion of the flight test programme and achieving certification. To improve sales prospects to the West, one of the prototypes (re-designated L-610G) is being re-engined with 1305kW General Electric CT7-9Ds, and was due to fly before the end of 1991, with certification and first deliveries targetted for the end of 1992. Let has also announced plans to stretch the L-610 into a 50-55 seater, probably using GE CT7 or PW100 engines. 



Powerplants :
 
L 610G - Two 1305kW (1750shp) General Electric CT7D9D turboprops driving four blade constant speed Hamilton Standard HS14RF23 propellers.

Performance :

L 610G - Max cruising speed 450km/h (243kt), long range cruising speed 282km/h (152kt). Initial rate of climb 1673ft/min. Service ceiling 23,620ft. Range with 40 passengers and reserves 1230km (615nm), range with max fuel 2420km (1306nm).





Weights :

L 610G - Empty 8950kg (19,713lb), operating empty 9220kg (20,327lb), max takeoff 14,500kg (31,967lb).

Dimensions :

Wing span 25.60m (84ft 0in), length 21.72m (71ft 3in), height 8.19m (26ft 11in). Wing area 56.0m2 (602.8sq ft).

Capacity :

Flightcrew of two. Standard seating for 40 passengers at three abreast and 76cm (30in) pitch. Combi mixed passenger/freight and all freight layouts available, the latter can carry six pallets.

Production :

Czech airline CSA is a provisional customer. Small numbers of L 610s were delivered to Aeroflot.
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Ayres Let L 610 Regional Airliner, Ayres Let L 610 40 seat regional airliner.

-- 
Regards,

Preeti Bagad [BE(CS)] 
SW Engineer Cum Blogger

On Line Assistence :
Y! Messenger : PreetiB.A1Soft@yahoo.com
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