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THE YAKOVLEV YAK-42

(Yk42 - Yk42A - Yk42B - Yk42D - Yk42D90 - Yk42D100 - Yk42D200 - Yk42DD - Yk42F - Yk42T)

Type: Short range airliner.

Country of origin: Russia.

Power plants:
                          Three 63.7kN ZMKB Progress (Lotarev) D36 turbofans.

Electrical power:
                              Supply frequency is 400 hz , three phase, and voltage is 115 - 200 V each generator
                              90 kva and supply 28 v dc power.

Performance:

              Yak42 Max cruising speed 437 kt, economical cruising speed 405 kt.
              APP speed 114 kt (cat app B),stall speed 102 kt, total fuel capacity 23330 Lit.

Range:
               Yak42      Range with max payload and reserves 745 nm , with 120 passengers 1025 nm.
               Yak42D   Range with 120 passengers 1185 nm.

Weights: Medium (M)

                              Yk42   Empty equipped 34,515 kg , max take off 57,000 kg , Max landing 51000 kg.
Dimensions:
                     Wing span: 34.88 m          Length: 36.215 m        Height: 9.83 m       Wing area: 150.0 m²                          Outer main gear wheel span: 5.63 m                     Fuselage max diameter: 3.80 m

Aeroplane classification code number and letter: 3C

Max cruising height: 31500 ft

Aeroplane classification by airport category: CAT 6

Minimum ground turning radius about nose wheel: 27.50 m

Wheel base: 14.96 m

Nose wheel steering angles: ± 55 ?

Wing aspect ratio: 8.1

landing field length at max landing weight: 1100 m

History:
             First flight (SSSR-1974) occurred on March 07 1975, and the first customer delivery, to Aeroflot

Capacity:      Flight crew of two pilots, with provision for a flight engineer, High density single class seating for 120 at six abreast, Two class seating for eight premium class passengers at four abreast and 96 economy class at six abreast.
Production:               More than 180 built, with most delivered to Aeroflot and its successors. Approx 150 were in commercial service in 1998. The Yak 42 was developed as a replacement for TU 134 twin jet and An 24, The Yak 42 is an all new design although , like the Yak 40 , it features a three engine configuration for increased redundancy and good short field performance. The LOTAREV turbofan meanwhile was one of the first true turbofans to be developed in the Soviet Union. Development flying revealed the need for increased wing sweep back, and the change of wing sweep angle and suspected development problems with the new three shaft turbofans delayed service entry to late 1980. Most production was of the initial Yak 42. The Yak 42D was introduced in 1989 and became the standard production model. It features increased fuel capacity, taking range with 120 passengers to 1185 nm. The Yak 42 T is a freighter design study. It would be fitted with a main deck freight door, and capacity would be 12 tones. The Yak 42D 100 meanwhile is a development with a four screen AlliedSignal EFIS cockpit among other improvements. One was displayed at the 1993 Paris Salon (as the Yak 142). A VIP/corporate jet development is also offered. The Yak 242 was an all new design study with the Yak 42's cross section, two PS90A turbofans and seating for up to 180. NATO reporting name (( clobber )) and western marketing name (( city star )).

QFZ: epQFA, EPQFB.




Sources:

Aerodrome design manual.

Jane^’s all the world^’s aircraft 1974 - 2002.

www. airliners.net.

airport services manual part 1 (aircraft data for rescue and fire fighting personnel).

aircraft type designators ( doc 8643/25).