The Walter Mars I was a nine-cylinder, air-cooled,

radial engine The radial engine is a reciprocating type internal combustion engine configuration in which the cylinders "radiate" outward from a central crankcase like the spokes of a wheel. It resembles a stylized star when viewed from the front, and is ...

for aircraft use built in Czechoslovakia in the late 1920s.

Design and development

The Mars I was the largest capacity design of a series of three similar radial engines developed by the Walter company. Common

cylinders A cylinder (from ) has traditionally been a three-dimensional solid, one of the most basic of curvilinear geometric shapes. In elementary geometry, it is considered a prism with a circle as its base. A cylinder may also be defined as an infini ...

were used for the five-cylinder

Walter Vega The Walter Vega was a five-cylinder, air-cooled, radial engine for aircraft use, built in Czechoslovakia in the late 1920s. Applications * Aero A.34 * ANBO V * Avia BH-11 * Couzinet 22 * Pander E85 * PWS-8 Specifications See also Refer ...

and the seven-cylinder

Walter Venus Walter may refer to: People * Walter (name), both a surname and a given name * Little Walter, American blues harmonica player Marion Walter Jacobs (1930–1968) * Gunther (wrestler), Austrian professional wrestler and trainer Walter Hahn (born 19 ...

, the Mars I being a nine-cylinder engine.

Applications

* ANBO III * Breda Ba.15 *

DAR 4 The DAR 4 was a prototype airliner built in Bulgaria in 1930. Design and development The DAR 4 was a conventional biplane A biplane is a fixed-wing aircraft with two main wings stacked one above the other. The first powered, controlled ...

DAR 6 The DAR 6 was a 1930s Bulgarian two-seat basic or advanced biplane training aircraft. Design and development The DAR 6 was designed by Zevtan Lazarov. It was constructed by the Bulgarian State Aircraft Workshops (DAR). The aircraft was a co ...

Fizir FN The Zmaj Fizir FN () was a plane designed for primary (initial) training of pilots in Yugoslavia before World War II. It was constructed in Zmaj, a Zemun-based factory, in the Rogožarski factory in Belgrade, and Albatros in Sremska Mitrovica. ...

Focke-Wulf A 33 The Focke-Wulf A 33 ''Sperber'' (German: "Sparrowhawk") was a small airliner, produced in Germany in the early 1930s. It was a high-wing cantilever monoplane of conventional design, resembling a scaled-down version of the contemporary A 32 desig ...

Letov Š-32 __NOTOC__ The Letov Š-32 was an airliner produced in small numbers in Czechoslovakia during the 1930s. It was a trimotor monoplane with a high, cantilever wing, and was designed to meet a requirement by ČSA for a machine to service a night ro ...

SET 10 __NOTOC__ The SET 10 (unrelated to the SET X design of the same year) was a trainer aircraft produced in Romania in prototype form in the early 1930s. It was a conventional, single-bay biplane with staggered wings braced with N-struts. It was eq ...

Specifications

References

{{Walter aeroengines

Mars I Phobos (; systematic designation: ) is the innermost and larger of the two natural satellites of Mars, the other being Deimos. The two moons were discovered in 1877 by American astronomer Asaph Hall. It is named after Phobos, the Greek god ...

1920s aircraft piston engines Aircraft air-cooled radial piston engines