{"as_of":"2026-10-27","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Design","items":[{"count":14,"name":"Waco BSO","note":"","unit":"registered","url":"https://eflight.com/models/waco/bso"},{"count":657,"name":"Waco","note":"","unit":"aircraft on the register","url":"https://eflight.com/makers/waco"},{"count":null,"name":"Built of steel tube, wood and fabric","note":"as the model family is built; the register does not record it per aircraft","unit":"","url":"https://eflight.com/materials/steel-wood-fabric"}],"relation":"is a"},{"group":"Engine","items":[{"count":225,"name":"Lycoming R680E series","note":"300 hp","unit":"aircraft with this engine series","url":"https://eflight.com/engines/lycoming-r680e-series"}],"relation":"powered by"},{"group":"Owner","items":[{"count":16,"name":"Old Style Aircraft LLC","note":"","unit":"aircraft in the fleet","url":"https://eflight.com/fleets/old-style-aircraft-llc"},{"count":null,"name":"Holds an FAA aircraft dealer certificate","note":"","unit":"","url":""}],"relation":"owned by"},{"group":"Place","items":[{"count":29,"name":"Ellsinore, MO","note":"","unit":"aircraft registered in this town","url":""},{"count":5813,"name":"Missouri","note":"","unit":"aircraft registered","url":"https://eflight.com/states/MO"}],"relation":"registered in"},{"group":"Record","items":[{"count":null,"name":"No NTSB accident or incident record under this tail number","note":"","unit":"","url":"https://eflight.com/aircraft/N261M#records-check"}],"relation":"involved in"},{"group":"Airworthiness","items":[{"count":5,"name":"FAA orders naming the Lycoming R680E series","note":"","unit":"airworthiness directives","url":"https://eflight.com/engines/lycoming-r680e-series#airworthiness"},{"count":1,"name":"Failure reports on the Lycoming R680E series","note":"","unit":"reports since 1995","url":"https://eflight.com/engines/lycoming-r680e-series#airworthiness"}],"relation":"subject to"},{"group":"Analytics","items":[{"count":null,"name":"Accident history of the Waco BSO","note":"","unit":"","url":"https://eflight.com/models/waco/bso#accidents"},{"count":null,"name":"Accidents by model, with rates per thousand registered","note":"","unit":"","url":"https://eflight.com/analytics/accidents-by-model"}],"relation":"compared in"},{"group":"Live","items":[{"count":null,"name":"Where N261M is now","note":"","unit":"","url":"https://eflight.com/live?q=N261M"}],"relation":"seen at"}],"graph":"https://eflight.com/graph","graph_index":"https://eflight.com/graph/index.json","license":"https://creativecommons.org/licenses/by/4.0/","node":{"built_of":{"inherited_from_model":true,"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":"N261M","maker":"Waco","model":"BSO","name":"Waco BSO N261M","state":"MO","type":"aircraft","url":"https://eflight.com/aircraft/N261M","year_built":null},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}