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The Comte AC-3 was a 1920s
Swiss
Swiss may refer to:
* the adjectival form of Switzerland
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bomber/transport aircraft produced by Flugzeugbau A. Comte.
Design and development
In November 1928, as a response to increasing tensions and clashes between troops in theGran Chaco
The Gran Chaco or Dry Chaco is a sparsely populated, hot and semiarid lowland natural region of the Río de la Plata basin, divided among eastern Bolivia, western Paraguay, northern Argentina, and a portion of the Brazilian states of Mato Gro ...
border region between Bolivia
, image_flag = Bandera de Bolivia (Estado).svg
, flag_alt = Horizontal tricolor (red, yellow, and green from top to bottom) with the coat of arms of Bolivia in the center
, flag_alt2 = 7 × 7 square p ...
and Paraguay
Paraguay (; ), officially the Republic of Paraguay ( es, República del Paraguay, links=no; gn, Tavakuairetã Paraguái, links=si), is a landlocked country in South America. It is bordered by Argentina to the south and southwest, Brazil to th ...
, Bolivia placed an order with Alfred Comte, the owner of a small Swiss aircraft manufacturer for three long-range bomber-transport aircraft, using funds collected by popular subscription.Stapfer 2005, p. 26.
The AC-3 was a high-wing semicantilever monoplane
A monoplane is a fixed-wing aircraft configuration with a single mainplane, in contrast to a biplane or other types of multiplanes, which have multiple planes.
A monoplane has inherently the highest efficiency and lowest drag of any wing confi ...
of mixed construction. It was fabric covered with a conventional tail unit. It had three open cockpits, one in the nose for a gunner or observer, one forward of the wing for a pilot, and one on the upper rear fuselage for a rear gunner. An unconventional engine layout had two 447 kW (600 hp) Hispano-Suiza
Hispano-Suiza () is a Spanish automotive–engineering company. It was founded in 1904 by Marc Birkigt and Damian Mateu as an automobile manufacturer and eventually had several factories in Spain and France that produced luxury cars, aircraft en ...
inline piston engine
A reciprocating engine, also often known as a piston engine, is typically a heat engine that uses one or more reciprocating pistons to convert high temperature and high pressure into a rotating motion. This article describes the common featu ...
s in tandem supported on eight struts above the fuselage. The installation had to be high enough to allow clearance for the two (one pusher, one tractor) propellers above the fuselage. A hatch in the port side allowed cargo or troops to be carried in the main cabin.
The new aircraft was too large to be built in Comte's existing factory, (the AC-3 was the largest aircraft ever to be developed and built in Switzerland) and forced Comte to build a new hangar just for the AC-3. It made its maiden flight from Dübendorf
Dübendorf is a municipality in the district of Uster in the canton of Zürich in Switzerland.
It is a suburb of Zürich in Switzerland with a population of about 30,000 (2021). It is the fourth largest city in the canton, after Zürich, Winter ...
airfield on 22 February 1930. The aircraft failed to meet its expected top speed, and as a result it was refitted with four-bladed propellers instead of the original two-bladed items. A collapse in the price of tin resulted in severe financial problems in Bolivia, and the military junta ruling Bolivia cancelled the order for the three Comte bombers, with only the first example being built, which was dismantled in 1935.Stapfer 2005, pp. 27–28.
Operators
; *Bolivian Air Force
The Bolivian Air Force ( es, Fuerza Aérea Boliviana or 'FAB') is the air force of Bolivia and branch of the Bolivian Armed Forces.
History
By 1938 the Bolivian air force consisted of about 60 aircraft (Curtiss Hawk fighters, Curtiss T-32 Co ...
Specifications
See also
References
Bibliography
* * {{Comte aircraft 1920s Swiss military aircraft Twin-engined push-pull aircraft AC-3 High-wing aircraft Aircraft first flown in 1930