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 ca ...

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 Refere ...

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 The ANBO III was a parasol-wing monoplane training and utility aircraft designed for the Lithuanian Army in 1929. It became the first aircraft of Lithuanian design to be built in series, with two batches of four aircraft produced in 1930 and 193 ...

Breda Ba.15 The Breda Ba.15 was a two-seat light aircraft produced in Italy in 1928. Design and development It was a high-wing braced monoplane of conventional design that seated the pilot and passenger in tandem within a fully enclosed cabin. Ba.15s were f ...

* DAR 4 * DAR 6 *

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 * Letov Š-32 *

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