United Kingdom (1917)
The planned successor to the Airco DH.4, the Airco DH.9 failed in most respects.
Detailing the development and operational history of the AirCo DH.9 Light Bomber Biplane Aircraft. Entry last updated on 5/16/2018. Authored by Staff Writer. Content ©www.MilitaryFactory.com
The DH.9 shared a few of the major design qualities found on the preceding DH.4 including the undercarriage, tail unit, and wings. The DH.9 differed from the DH.4 in that it positioned the gunner and pilot closer together to better communications between the two and was fitted with a more powerful engine. The new fuselage was also intended to streamline the aircraft and take away stresses from the engine. Initial tests revealed that the base DH.9 was simply too underpowered and not much of an upgrade over the DH.4 (which it was meant to replace) thus the system was redesigned as the DH.9A. The DH.9A model attempted to address performance issues and defensive drawbacks by incorporating a lengthened wingspan and a fixed forward-firing machine gun for the pilot. A trainable machine gun was found at the rear gunner/observer's cockpit for protecting the aircraft's critical "six" position.
Not a spectacular aircraft in any one regard, the DH.9 managed a rather poor service record in World War 1 with more losses due to mechanical and performance issues than actual enemy fire. Notable deficiencies in the series lay in its limited service ceiling, fuel consumption at altitudes higher than 10,000 feet, and general engine reliability. If there was one role that the DH.9 proved at least somewhat adequate in was in coastal patrol assignments when hunting down German U-boats - there was a reduced chance of running into enemy aircraft or ground-based fire in this role. Though generally inadequate over most fronts, the DH.9 was naturally more successful in poorly defended areas during the course of the war, this to be true in the Middle East Theater over Palestine and also over Macedonia.
The DH.9 series saw some life after the war in the civil transportation market with many countries. Final production of the DH.9 extended into 1920 - the United States manufactured the DH.9 with the help of the Engineering Division and designated the aircraft as "USD-9" (1,415 were produced by the U.S.). An American-produced engine - the 400 horsepower Packard "Liberty" - was used to power these DH.9A models.
Any available statistics for the AirCo DH.9 Light Bomber Biplane Aircraft are showcased in the areas immediately below. Categories include basic specifications covering country-of-origin, operational status, manufacture(s) and total quantitative production. Other qualities showcased are related to structural values (namely dimensions), installed power and standard day performance figures, installed or proposed armament and mission equipment (if any), global users (from A-to-Z) and series model variants (if any).
Our Data Modules allow for quick visual reference when comparing a single entry against contemporary designs. Areas covered include general ratings, speed assessments, and relative ranges based on distances between major cities.
Relative Maximum Speed Rating
This entry's maximum listed speed (113mph).
Graph average of 90 miles-per-hour.
Relative Operational Ranges
Graph showcases the AirCo DH.9's operational range (on internal fuel) when compared to distances between major cities.