{"as_of":"2026-10-28","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Model families","items":[{"count":62,"name":"Commonwealth 185","note":"","unit":"registered","url":"https://eflight.com/models/commonwealth/185"},{"count":16,"name":"Commonwealth REARWIN 185","note":"","unit":"registered","url":"https://eflight.com/models/commonwealth/rearwin-185"}],"relation":"makes"},{"group":"Engines","items":[{"count":72,"name":"Continental C85 series","note":"85 hp","unit":"of these aircraft","url":"https://eflight.com/engines/continental-c85-series"},{"count":3,"name":"Continental A75 / C75 series","note":"75 hp","unit":"of these aircraft","url":"https://eflight.com/engines/continental-a75-c75-series"},{"count":2,"name":"Lycoming O-235 series","note":"115 hp","unit":"of these aircraft","url":"https://eflight.com/engines/lycoming-o-235-series"},{"count":2,"name":"Franklin 4AC176C-D-F","note":"80 hp","unit":"of these aircraft","url":"https://eflight.com/engines/franklin-4ac176c-d-f"},{"count":2,"name":"Continental C90 series","note":"95 hp","unit":"of these aircraft","url":"https://eflight.com/engines/continental-c90-series"}],"relation":"powered by"},{"group":"Where they are","items":[{"count":8,"name":"Washington","note":"","unit":"of these aircraft","url":"https://eflight.com/states/WA"},{"count":8,"name":"Oregon","note":"","unit":"of these aircraft","url":"https://eflight.com/states/OR"},{"count":8,"name":"Florida","note":"","unit":"of these aircraft","url":"https://eflight.com/states/FL"},{"count":6,"name":"Michigan","note":"","unit":"of these aircraft","url":"https://eflight.com/states/MI"},{"count":5,"name":"Ohio","note":"","unit":"of these aircraft","url":"https://eflight.com/states/OH"}],"relation":"registered in"},{"group":"Biggest operators","items":[{"count":1,"name":"Western Antique Aeroplane & Automobile Museum","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/western-antique-aeroplane-automobile-museum"}],"relation":"owned by"},{"group":"Record","items":[{"count":8,"name":"NTSB accidents and incidents involving Commonwealth aircraft","note":"as the NTSB spells the maker's name","unit":"cases since 1982","url":"https://eflight.com/analytics/accidents-by-model"}],"relation":"involved in"},{"group":"Analytics","items":[{"count":null,"name":"Biggest makers and model families","note":"","unit":"","url":"https://eflight.com/analytics/makers"},{"count":null,"name":"Accidents by model and by maker","note":"","unit":"","url":"https://eflight.com/analytics/accidents-by-model"}],"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":{"id":"commonwealth","name":"Commonwealth","registered":87,"type":"maker","url":"https://eflight.com/makers/commonwealth"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}