Honeywell LF 507
AlliedSignal LF 507
Lycoming LF 507

The Honeywell LF 507 is a geared turbofan engine produced by Lycoming, AlliedSignal and then Honeywell Aerospace. The earlier ALF 502 was certified in 1980. The improved, higher-thrust LF 507 was used on the Avro RJ update of the British Aerospace BAe 146.

LF 507-1H
Type: High bypass geared turbofan
Length: 65.5 in (166 cm)
Diameter: Fan: 40.25 in (102 cm)
Dry weight: 1385 lb (628 kg)
Compressor: Single stage fan, 2 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
Maximum thrust: 7,000 lbf (31 kN)
Overall pressure ratio: 13.8:1
Bypass ratio: 5.3:1
Specific fuel consumption: 0.406 lb/lbf-h (41.4 kg/kN-hr)
Thrust-to-weight ratio: 5.1:1