Lycoming ALF 502

ALF 502
	ALF 502 removed from a Bombardier Challenger 600-1A11
Type	Geared turbofan
National origin	United States
Manufacturer	Lycoming Engines; Honeywell Aerospace
First run	1980
Major applications	Bombardier Challenger 600; British Aerospace 146; Northrop YA-9
Developed into	Honeywell LF 507

The YF102-LD-100 was tested on an AJ Savage in the early 1970s.

Honeywell ALF 502 on a BAe 146

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.^[1] 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.

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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

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v t e Lycoming aircraft engines
Opposed piston engines	O-145 O-233 IO-233 O-235 O-290 O-320 O-340 O-360 (O-360 variants) IO-390 O-435 O-480 O-540 TIO-541 GSO-580 IO-580 IO-720 O-1230
Radial engines and H engines	R-680 R-7755 H-2470
Turbofans	PLF1 ALF 502/YF102 LF 507
Turboprops/Turboshafts	AGT1500 LTS101/LTP101 T53 T55
Aero-derivative marine gas turbines	TF-40
Joint development	Avco (Lycoming)/Pratt & Whitney: T800-APW (Turboshaft)
See also	AlliedSignal Aerospace/Honeywell Aerospace

v t e United States military gas turbine aircraft engine designation system
Turbojets	J30 J31 J32 J33 J34 J35 J36 J37 XJ38 J39 J40 XJ41 J42 J43 J44 J45 J46 J47 J48 XJ49 J51 J52 J53 J54 J55 J56 J57 J58 J59 J60 J61 J63 J65 J67 J69 J71 J73 J75 J79 J81 J83 J85 J87 J89 J91 YJ93 J95 J97 J99 J100 YJ101 J102 J400 J401 J402 J403 J700
Turboprops/ Turboshafts	T30 T31 T33 T34 T35 T36 T37 T38 T39 T40 T41 T42 T43 T44 T45 T46 T47 T48 T49 T50 T51 T52 T53 T54 T55 T56 T57 T58 T60 T61 T62 T63 T64 T65 T66 T67 T68 T69 T70 T71 T72 T73 T74 T76 T78 T80 T100 T101 T400 T405 T406 T407 T408 T700 T701 T702 T703 T706 T708 T800
Turbofans	TF30 TF31 TF32 TF33 TF34 TF35 TF37 TF39 TF41 F100 F101 F102 F103 F104 F105 F106 F107 F108 F109 F110 F112 F113 F117 F118 F119 YF120 F121 F122 F124 F125 F126 F127 F128 F129 F135 F136 F137 F138 F400 F401 F402 F404 F405 F408 F412 F414 F415