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gptkbp:instance_of
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gptkb:jet_engine
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gptkbp:application
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gptkb:military_aircraft
civil aircraft
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gptkbp:bore
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5.5 inches
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gptkbp:compression_ratio
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6.0:1
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gptkbp:configuration
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9-cylinder
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gptkbp:cooling_system
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air-cooled
air-cooled engine
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gptkbp:displacement
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985 cubic inches
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gptkbp:engine
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smooth operation
iconic design
reliable performance
easy maintenance
good power-to-weight ratio
four-stroke cycle
versatile applications
low vibration
good fuel efficiency
legacy in aviation history
widely used in aviation
historically significant engine
Pratt & Whitney R-800 series
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gptkbp:engine_configuration
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horizontally opposed
radial layout
conventional radial design
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gptkbp:engine_power
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high reliability
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gptkbp:engine_type
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piston engine
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gptkbp:first_flight
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1939
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gptkbp:fuel_type
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aviation gasoline
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https://www.w3.org/2000/01/rdf-schema#label
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Pratt & Whitney R-985
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gptkbp:ignition_system
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dual ignition
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gptkbp:manufacturer
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gptkb:Pratt_&_Whitney
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gptkbp:notable_users
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gptkb:civil_aviation
gptkb:Royal_Canadian_Air_Force
gptkb:United_States_Air_Force
gptkb:United_States_Navy
various air show performers
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gptkbp:power_output
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450 horsepower
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gptkbp:powers
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450 horsepower
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gptkbp:production_years
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1939-1950s
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gptkbp:stroke
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6.0 inches
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gptkbp:successor
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gptkb:Pratt_&_Whitney_R-1340
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gptkbp:type
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gptkb:radial_engine
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gptkbp:used_in
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gptkb:Douglas_DC-3
gptkb:Beechcraft_Model_18
gptkb:Fairchild_24
gptkb:Waco_YMF-5
various aircraft
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gptkbp:valve_configuration
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pushrod actuated
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gptkbp:weight
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350 pounds
about 600 pounds
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gptkbp:bfsParent
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gptkb:G-73_E_Mallard
gptkb:DHC-18_A
gptkb:Model_12_Electra_Junior
gptkb:Continental_R-975
gptkb:Beechcraft_D18
gptkb:Pratt_&_Whitney_R-1340
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gptkbp:bfsLayer
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7
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