{"as_of":"2026-10-30","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Fitted to","items":[{"count":1,"name":"Quad City CHALLENGER II","note":"","unit":"with this engine series","url":"https://eflight.com/models/quad-city/challenger-ii"}],"relation":"powers"},{"group":"Where they are","items":[{"count":2,"name":"Indiana","note":"","unit":"of these aircraft","url":"https://eflight.com/states/IN"},{"count":1,"name":"Virginia","note":"","unit":"of these aircraft","url":"https://eflight.com/states/VA"},{"count":1,"name":"Texas","note":"","unit":"of these aircraft","url":"https://eflight.com/states/TX"},{"count":1,"name":"Oklahoma","note":"","unit":"of these aircraft","url":"https://eflight.com/states/OK"},{"count":1,"name":"North Carolina","note":"","unit":"of these aircraft","url":"https://eflight.com/states/NC"}],"relation":"registered in"},{"group":"Analytics","items":[{"count":null,"name":"The fleet by engine type","note":"","unit":"","url":"https://eflight.com/analytics/fleet"},{"count":null,"name":"Every engine series","note":"","unit":"","url":"https://eflight.com/engines"}],"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":{"aircraft":9,"horsepower":55,"id":"hirth-2703","maker":"Hirth","name":"Hirth 2703","thrust_lb":null,"type":"Two-cycle piston","url":"https://eflight.com/engines/hirth-2703"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}