Editing Rolls-Royce RB.183 Tay (section)

==Variants==
{{Unreferenced section|date=January 2011}}
{{anchor|611-8}}
===Tay 611-8===
[[File:Klm f100 ph-kle arp.jpg|thumb|Rolls-Royce Tay on a Fokker 100, with thrust reverser engaged.]]
Originally designated 610-8, all but one training engine have now been converted to 611-8 standard. The newest variant is the 611-8C, which has cast HP1 turbine blades, larger fan from the 650-15, structural by-pass duct and [[FADEC]].

All Tay engines use a 22-blade titanium fan, a 3-stage intermediate-pressure compressor coupled to the fan shaft, a 12-stage high-pressure compressor, a 2-stage high-pressure turbine and a 3-stage low-pressure turbine.

Thrust: 13,850 [[pound-force|lbf]] (62 [[newton (unit)|kN]])
Aircraft: Tay 611 entered service in 1987 on the [[Gulfstream IV|Gulfstream IV/IV-SP]], for which it is the exclusive powerplant.

===Tay 620-15===
[[File:N650DH BAC 111-401AK One-Eleven (cn 059) Dee Howard. (5644120829).jpg|thumb|A BAC 1-11 re-engined with the Tay]]
The 620-15 is internally identical to the 611-8 and externally similar to the 650-15.

Thrust: 13,850 [[pound-force|lbf]] (62 [[newton (unit)|kN]])
Aircraft: [[Fokker 70]] from 1994, [[Fokker 100]] from 1988
===Tay 650-15===
Thrust: 15,100 [[pound-force|lbf]] (67 [[newton (unit)|kN]])
Aircraft: Originally designed to re-engine the [[BAC 1-11|BAC One-Eleven]] (650-14, only two made; both have since been converted to 650-15 standard.), the 650-15 entered service on the [[Fokker 100]] in 1989.

===Tay 651-54===
The 651-54 is internally identical to the 650-15. The externals and gearbox suit the Boeing 727.<ref>FAA Type Certificate Data Sheet</ref>

Thrust: 15,400 [[pound-force|lbf]] (69 [[newton (unit)|kN]])
Aircraft: [[Boeing 727|Boeing 727-100]] from [[1992 in aviation|1992]]. Conversion from three [[Pratt & Whitney JT8D|JT8D-7]] to three Tay 651-54 was carried out by the now defunct Dee Howard Aircraft Maintenance Company in San Antonio, Texas, for the [[United Parcel Service]], but all aircraft have since been withdrawn from service. Only one private 727 was converted.