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The militarized A.304 was developed from the Aero A.204, a proposed passenger airliner that found little market interest.
Detailing the development and operational history of the Aero A.304 Twin-Engine Medium Bomber Aircraft. Entry last updated on 5/19/2018. Authored by Staff Writer. Content ©www.MilitaryFactory.com
The A.304 mimicked much of the A.204's design complete with the low-set wing arrangement, stout rounded fuselage and tail assembly. The nose was glazed over to provide vision for the bombardier. The cockpit was stepped and offered up vision to the front, sides and above the aircraft to a limited extent. A dorsal turret emplacement was set at amidships to provide for defense against enemy fighters. A line of windows ran along each fuselage side. Engines were set in streamlined nacelles along each wing leading edge. Wingtips were elegantly rounded as were the end surfaces of the tail. The undercarriage was of the "tail dragger" arrangement with two single-wheeled main landing gear legs under each engine nacelle and a single diminutive tail wheel installation.
Power for the A.304 came from 2 x Walter Super Castor I MR 9-cylinder, air-cooled radial piston engines delivering 460 horsepower apiece. The Walter Super Castor was an indigenous 9-cylinder Czech aircraft engine based on the original Walter Castor 7-cylinder of the 1920s. Top listed speed was 200 miles per hour with a cruise speed of about 180 miles per hour. Range was limited to 745 miles and a service ceiling of 19,000 feet was reported. Rate-of-climb was 1,330 feet per minute.
A standard operational crew consisted of four personnel. This included the two pilots, a navigator that doubled as the bombardier and a dedicated machine gunner.
As a dedicated bomber, the Aero A.304 was defended from enemy fighters by machine guns. This included a fixed, forward-firing 7.92mm ZB-30 series machine gun as well as a 7.92mm vz.30 type machine gun in the dorsal turret. The turret was manually operated with no external power support. An additional 7.92mm vz.30 machine gun was used in a trainable rearward firing crew position intended to attack aircraft lower than the dorsal turret's arc of fire. A typical bombload of 660lbs could be carried for offensive work and these were all held externally across three hard points - underfuselage and under each wing.
After the fall of Czechoslovakia to the German Army, the Aero A.304 saw limited service with the German Luftwaffe. During time, the nation of Czechoslovakia technically did not exist for the country was divided into the Protectorate of Bohemia and Moravia and the Slovak Republic. Regardless, a government-in-exile continued to exist outside of the country borders, authorities now being based in London for the duration of the war. Before the German invasion, Aero was also working on a refined and improved form of the A.304 known as the "A.300" which first flew in 1938 with a pair of Bristol Mercury IX 9-cylinder radial piston engines (818hp each) installed. However, the German invasion disrupted all future work and the bomber fell to history. Bulgaria became the only other foreign operator of the A.304 and managed to maintained just one flight group for a time. These aircraft were known under the designation of "Pelikan".
In all, only 19 A.304 bombers were produced by Aero. A.304s served from 1937 to 1945.
Any available statistics for the Aero A.304 Twin-Engine Medium Bomber 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 (200mph).
Graph average of 150 miles-per-hour.
Graph showcases the Aero A.304's operational range (on internal fuel) when compared to distances between major cities.