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gptkbp:instance_of
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gptkb:jet_engine
|
|
gptkbp:application
|
commercial aviation
|
|
gptkbp:armament
|
composite
|
|
gptkbp:bypass_ratio
|
3.5:1
|
|
gptkbp:compressor_type
|
axial compressor
|
|
gptkbp:control_system
|
hydromechanical
|
|
gptkbp:cooling_system
|
air-cooled
|
|
gptkbp:design
|
low bypass turbofan
|
|
gptkbp:development
|
1950s to 1960s
|
|
gptkbp:diameter
|
3.0 ft
56 in
|
|
gptkbp:emissions_standard
|
Stage 3
|
|
gptkbp:engine
|
Brayton cycle
air start
every 5,000 hours
|
|
gptkbp:engine_configuration
|
twin spool
|
|
gptkbp:engine_power
|
20,000 hours
|
|
gptkbp:first_flight
|
gptkb:1960
|
|
gptkbp:fuel_economy
|
moderate
0.5 lb/lbf/hr
|
|
gptkbp:fuel_type
|
gptkb:Jet_A
|
|
gptkbp:has_variations
|
multiple
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
JT8 D family
|
|
gptkbp:legacy
|
widely used in 727 aircraft.
|
|
gptkbp:length
|
4.5 ft
|
|
gptkbp:maintenance
|
4,000 hours
|
|
gptkbp:manufacturer
|
gptkb:Pratt_&_Whitney
|
|
gptkbp:market_segment
|
regional jets
|
|
gptkbp:noise_level
|
low
|
|
gptkbp:notable_users
|
gptkb:Delta_Air_Lines
gptkb:United_Airlines
gptkb:Eastern_Air_Lines
|
|
gptkbp:operational_history
|
over 40 years
|
|
gptkbp:propulsion
|
yes
5.0:1
14,000 to 18,500 lbf
|
|
gptkbp:reliability
|
high
|
|
gptkbp:retirement
|
2000s
|
|
gptkbp:service_ceiling
|
40,000 ft
|
|
gptkbp:successor
|
gptkb:PW4000
|
|
gptkbp:turbine_type
|
high bypass ratio
|
|
gptkbp:type
|
gptkb:turbofan_engine
|
|
gptkbp:used_in
|
gptkb:Boeing_727
|
|
gptkbp:weight
|
1,500 lb
3,000 lb
|
|
gptkbp:bfsParent
|
gptkb:Pratt_&_Whitney_JT8_D
|
|
gptkbp:bfsLayer
|
6
|