{"as_of":"2026-10-27","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Fitted to","items":[{"count":6,"name":"Northrop C-125","note":"","unit":"with this engine series","url":"https://eflight.com/models/northrop/c-125"},{"count":6,"name":"Lockheed 18","note":"","unit":"with this engine series","url":"https://eflight.com/models/lockheed/18"},{"count":5,"name":"Grumman FM-2","note":"","unit":"with this engine series","url":"https://eflight.com/models/grumman/fm-2"},{"count":1,"name":"Douglas DC-3","note":"","unit":"with this engine series","url":"https://eflight.com/models/douglas/dc-3"}],"relation":"powers"},{"group":"Where they are","items":[{"count":7,"name":"Florida","note":"","unit":"of these aircraft","url":"https://eflight.com/states/FL"},{"count":3,"name":"Texas","note":"","unit":"of these aircraft","url":"https://eflight.com/states/TX"},{"count":3,"name":"California","note":"","unit":"of these aircraft","url":"https://eflight.com/states/CA"},{"count":2,"name":"Delaware","note":"","unit":"of these aircraft","url":"https://eflight.com/states/DE"},{"count":1,"name":"Wyoming","note":"","unit":"of these aircraft","url":"https://eflight.com/states/WY"}],"relation":"registered in"},{"group":"Biggest operators","items":[{"count":1,"name":"Yanks Air Museum","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/yanks-air-museum"},{"count":1,"name":"Tsi Holdco INC","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/tsi-holdco-inc"}],"relation":"owned by"},{"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":20,"horsepower":1425,"id":"wright-c9hd-series","maker":"Wright","name":"Wright C9HD series","thrust_lb":null,"type":"Piston (reciprocating)","url":"https://eflight.com/engines/wright-c9hd-series"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}