Lycoming ALF 502

Updated on Oct 30, 2023

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The Lycoming ALF 502 is a geared turbofan engine produced by Lycoming, AlliedSignal and then Honeywell Aerospace.

Development

The original YF102 was developed at the Lycoming Turbine Engine Division in Stratford, Connecticut by adding a fan to the Lycoming T55 engine, which was used as the gas generator. Six engines were built for the Northrop YA-9 prototype ground-attack aircraft. These engines were later reused in the C-8A Quiet Short-Haul Research Aircraft (QSRA).

The ALF 502 was certified in 1980, and used on the British Aerospace 146 and Bombardier Challenger 600. The improved, higher-thrust LF 507 was used on the Avro RJ update of the BAe 146.

Variants

ALF502

ALF502R

ALF502R-3

ALF502R-3A

ALF502R-5

ALF502R-6

ALF502R-7

ALF502L

ALF502L-2

ALF502L-2A

ALF502L-3

Applications

YF102

Northrop YA-9

C-8A Quiet Short-Haul Research Aircraft (QSRA)

ALF 502

Bombardier Challenger 600

British Aerospace 146

Specifications (ALF502-R5)

Data from "ALF 502 Turbofan Engine -Honeywell Aerospace". November 29, 2010.

General characteristics

Type: High bypass geared turbofan

Length: 63.6 in (162 cm)

Diameter: Fan: 40.25 in (102 cm)

Dry weight: 1336 lb (606 kg)

Components

Compressor: Single stage fan, single stage axial low pressure compressor, 7 stage axial and single stage centrifugal high pressure compressor

Combustors: Annular

Turbine: Two stage high pressure turbine, two stage low pressure turbine

Performance

Maximum thrust: 6,970 lb_f (31 kN)

Bypass ratio: 5.7:1

Specific fuel consumption: 0.406 lb/lb_f-h (41.4 kg/kN-hr)

Thrust-to-weight ratio: 5.1:1

References

Lycoming ALF 502 Wikipedia

(Text) CC BY-SA

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