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Tay,Spey & Dart

The Tay 611-8 powering the Gulfstream GIV, GIV-SP, G300 and G400 aircraft is renowned for its reliability. The latest Tay engine 611-8C for the Gulfstream G450 includes the incorporation of an electronic engine control system (FADEC).

The latest Tay edition continues with the record reliability set over the last 40 years by the preceding Rolls-Royce powered Gulfstream GI (Dart powered), GII, and GIII (Spey powered).

Due to its outstanding performances Rolls-Royce Tay powered aircraft are being outfitted for a variety of special mission applications such as VIP transport or multi-role surveillance operations. The Gulfstream GIV and GIV-SP are widely used for special mission purposes, with more than 50 aircraft in service with governments world wide.

The Spey engines also power a range of military aircraft, the Dart engine still operates on Fokker 27 in many countries.

The Tay 650 on the Fokker 100 aircraft model provides - compared to the older Tay 620 - an increased maximum thrust for take-off, climb and cruise, plus efficiency improvements through an increase in fan diameter and an advanced high-pressure turbine. The Fokker 100 serves major airlines on regional routes all over the world. Other Tay engine applications include the re-engined Boeing 727 (Tay 651) and the Fokker 70 (Tay 620).

 
View cross-section of the Tay
View cross-section of the Spey
View cross-section of the Dart
Technical details
The Tay is a two-shaft high-bypass ratio engine. It consists of a 44-45 inch diameter wide-chord fan with three stages of LP compressor to the rear, a 12-stage HP compressor; annular combustion system, consisting of ten combustors; a two-stage HP turbine; and three-stage LP turbine. The majority of the bypass duct is constructed in carbon fiber composite material. Cold bypass air and hot exhaust are combined in a forced mixer that gives good propulsive efficiency and low noise generation.
- Today's fleet of over 750 Tay-powered aircraft has accumulated over 14   millions flight hours in service
- The average Tay 650 engine basic despatch reliability consistently achieves   or exceeds 99.95 %.
Engine Tay 651 Tay 650 Tay 620
Entry into Service 1992 1989 1988
Max Take-off Thrust 15,400lb (68.4 kN) 15,100lb (67.0kN) 13,850lb (61.5kN)
Aircraft Applications Boeing 727-100RE Fokker 100 Fokker 100/70
Max Passg.* - 107 79
Max Range (nm)* - 1,680 2,020
       

Engine Tay 611-8 Spey 511 Dart 529
Entry into Service 1987 1968 1959
Max Take-off Thrust 13,850lb (61.5kN) 11,400lb (50.6kN) 2,210shp
Aircraft Applications Gulfstream GIV, GIV-SP, G300, G400 Gulfstream GII, GIII Gulfstream GI
Max Passg.* 19 19 19
Max Range (nm)* 4,200 2,613 / 3,691 1,938
       
*Aircraft Manufacturer's Data
   

 

Further information

Tay CorporateCare™ Package
Total engine maintenance cost programme, simple and flexible comprehensive cost per flight hour service.

Contact us

Tay customer training
Course information, schedules and contacts

Tay, Spey & Dart Repair & Overhaul
Rolls-Royce offers full repair and overhaul facilities for these products in the following countries:

- Brazil
- Canada
- UK
- USA (Tay only)