{"as_of":"2026-10-30","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Design","items":[{"count":657,"name":"Waco","note":"","unit":"aircraft on the register","url":"https://eflight.com/makers/waco"},{"count":27,"name":"Waco ATO","note":"","unit":"registered","url":"https://eflight.com/models/waco/ato?variant=ATO"},{"count":null,"name":"Built of steel tube, wood and fabric","note":"A biplane of the 1920s and 1930s: steel-tube fuselage, wooden wings, fabric covering.","unit":"","url":"https://eflight.com/materials/steel-wood-fabric"}],"relation":"made by"},{"group":"Engines","items":[{"count":4,"name":"Wright WWJ series","note":"220 hp","unit":"of these aircraft","url":"https://eflight.com/engines/wright-wwj-series"},{"count":2,"name":"Wright 975E-1","note":"365 hp","unit":"of these aircraft","url":"https://eflight.com/engines/wright-975e-1"},{"count":2,"name":"Wright 760E-1","note":"300 hp","unit":"of these aircraft","url":"https://eflight.com/engines/wright-760e-1"},{"count":1,"name":"Wright R-975-11","note":"450 hp","unit":"of these aircraft","url":"https://eflight.com/engines/wright-r-975-11"},{"count":1,"name":"Wright R-760-8","note":"235 hp","unit":"of these aircraft","url":"https://eflight.com/engines/wright-r-760-8"}],"relation":"powered by"},{"group":"Where they are","items":[{"count":5,"name":"Ohio","note":"","unit":"of these aircraft","url":"https://eflight.com/states/OH"},{"count":4,"name":"Missouri","note":"","unit":"of these aircraft","url":"https://eflight.com/states/MO"},{"count":3,"name":"Wisconsin","note":"","unit":"of these aircraft","url":"https://eflight.com/states/WI"},{"count":2,"name":"New York","note":"","unit":"of these aircraft","url":"https://eflight.com/states/NY"},{"count":2,"name":"California","note":"","unit":"of these aircraft","url":"https://eflight.com/states/CA"}],"relation":"registered in"},{"group":"Biggest operators","items":[{"count":3,"name":"Old Style Aircraft LLC","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/old-style-aircraft-llc"},{"count":1,"name":"Western Antique Aeroplane & Automobile Museum","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/western-antique-aeroplane-automobile-museum"},{"count":1,"name":"Waco Historical Society INC","note":"","unit":"of these aircraft","url":"https://eflight.com/search?q=Waco Historical Society INC"},{"count":1,"name":"Vintage Wings LLC","note":"","unit":"of these aircraft","url":"https://eflight.com/search?q=Vintage Wings LLC"},{"count":1,"name":"Poplar Grove Airmotive INC","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/poplar-grove-airmotive-inc"}],"relation":"owned by"},{"group":"Record","items":[{"count":2,"name":"NTSB accidents and incidents involving the ATO","note":"0 fatal","unit":"cases since 1982","url":"https://eflight.com/models/waco/ato#accidents"}],"relation":"involved in"},{"group":"Airworthiness","items":[{"count":1,"name":"Failure reports filed on the ATO","note":"","unit":"reports since 1995","url":"https://eflight.com/models/waco/ato#airworthiness"},{"count":1,"name":"Approved modifications for the ATO","note":"","unit":"supplemental type certificates","url":"https://eflight.com/models/waco/ato#airworthiness"}],"relation":"subject to"},{"group":"Analytics","items":[{"count":null,"name":"Accidents by model, with rates per thousand registered","note":"","unit":"","url":"https://eflight.com/analytics/accidents-by-model"},{"count":null,"name":"The fleet by kind, state and age","note":"","unit":"","url":"https://eflight.com/analytics/fleet"},{"count":null,"name":"Biggest makers and model families","note":"","unit":"","url":"https://eflight.com/analytics/makers"}],"relation":"compared in"}],"graph":"https://eflight.com/graph","graph_index":"https://eflight.com/graph/index.json","license":"https://creativecommons.org/licenses/by/4.0/","node":{"built_of":{"material":"steel-wood-fabric","name":"steel tube, wood and fabric","note":"A biplane of the 1920s and 1930s: steel-tube fuselage, wooden wings, fabric covering."},"id":"waco/ato","name":"Waco ATO","registered":27,"type":"model","url":"https://eflight.com/models/waco/ato","versions":1},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}