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Tay

  • Thrust range from 13,850 lbf to 15,400 lbf

  • More than 13 million flying hours accumulated

The Tay provides the quietest operation in its class and has levels of emissions well below those required for current and future regulations. The engine has proven extremely reliable and durable in demanding short-haul operations.

The Tay 611-8 on the Gulfstream IV-SP aircraft is renowned for its reliability, essential in a military environment. The aircraft is used for VIP transport and multi-role surveillance operations with a number of military customers around the world.

The Tay 650 on the Fokker 100 aircraft and the 651 on the re-engined Boeing 727, provide increased maximum thrust for take-off, climb and cruise, plus efficiency improvements through small increases in fan diameter and an advanced high-pressure turbine.

The Tay is a 2-shaft high-bypass ratio engine featuring a wide-chord fan with three stages of low pressure (LP) compressor and a 12-stage high pressure (HP) compressor driven by a two-stage high pressure (HP) turbine and three-stage low pressure (LP) turbine respectively. It has an annular combustion system consisting of ten combustors. The majority of the bypass duct is constructed in carbon fiber composite material. Cold bypass air and hot exhaust gases are combined in a forced mixer that gives good propulsive efficiency and low noise generation.

Specification

Tay 611-8

Tay 650

Thrust (lbf)

13,850

15,400

Bypass ratio

3.04

3.06

Pressure ratio

15.8

16.2

Length (in)

94.7

94.8

Diameter (in)

44

45

Basic weight (lb)

2,951

3,340

Compressor

4LP, 12HP

4LP, 12HP

Turbine

2HP, 3LP

2HP, 3LP

Applications

Gulfstream GIV-SP, Fokker 70, Fokker 100, Boeing 727

*Technical data (ISA SLS)