| gptkbp:instanceOf | gptkb:piston_engine 
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                                | gptkbp:application | helicopters fixed-wing aircraft
 
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                                | gptkbp:bore | 5.1875 in 
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                                | gptkbp:compressionRatio | 6:1 
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                                | gptkbp:coolingSystem | air-cooled 
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                                | gptkbp:countryOfOrigin | gptkb:United_States 
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                                | gptkbp:diameter | 48 in 
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                                | gptkbp:displacement | 985 cubic inches 
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                                | gptkbp:engineType | gptkb:piston_engine 
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                                | gptkbp:firstFlight | 1929 
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                                | gptkbp:fuelType | aviation gasoline ~27 gal/hr at cruise
 
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                                | gptkbp:ignition | dual magnetos 
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                                | gptkbp:length | 44.5 in 
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                                | gptkbp:lubricationSystem | dry sump 
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                                | gptkbp:manufacturer | gptkb:Pratt_&_Whitney 
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                                | gptkbp:nickname | gptkb:Wasp_Junior 
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                                | gptkbp:notableFor | reliability widespread use in bush planes
 
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                                | gptkbp:numberOfEngines | 9 
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                                | gptkbp:powerOutput | up to 450 hp 
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                                | gptkbp:productionStartYear | 1929–1953 
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                                | gptkbp:stroke | 5.75 in 
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                                | gptkbp:successor | gptkb:Pratt_&_Whitney_R-1340 
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                                | gptkbp:supercharger | single-stage, gear-driven 
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                                | gptkbp:usedIn | gptkb:Beechcraft_Model_18 gptkb:Lockheed_Model_10_Electra
 gptkb:Grumman_Goose
 gptkb:Cessna_195
 gptkb:de_Havilland_Canada_DHC-2_Beaver
 gptkb:Cessna_190
 gptkb:Stinson_Model_A
 gptkb:Fairchild_71
 gptkb:Bell_47G-3B-1_helicopter
 gptkb:Howard_DGA-15
 gptkb:Spartan_Executive
 gptkb:Stearman_Model_4
 gptkb:Waco_Custom_Cabin
 
 | 
                        
                            
                                | gptkbp:valveConfiguration | overhead valves 
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                                | gptkbp:weight | ~650 lb (dry) 
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                                | gptkbp:bfsParent | gptkb:AT-11_Kansan gptkb:C-45_Expeditor
 
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                                | gptkbp:bfsLayer | 6 
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                                | https://www.w3.org/2000/01/rdf-schema#label | Pratt & Whitney R-985 
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