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The Walter Atlas 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 early 1930s.
Design and development
The Atlas was the largest capacity and most powerful radial engine design developed by the Walter company. The engine was an attempt at high power output by using a much larger bore size than company's previous range. The engine was test run in spring 1930, encountering problems with cooling and operation.Němeček 1983. The engine appeared at the Paris Aerosalon in December of that year. The engine did not attract any customers, further development was cancelled in 1931 and the company moved to producing licensed versions of theBristol Mercury
The Bristol Mercury is a British nine-cylinder, air-cooled, single-row, piston radial engine. Designed by Roy Fedden of the Bristol Aeroplane Company it was used to power both civil and military aircraft of the 1930s and 1940s. Developed from ...
, Pegasus
Pegasus ( grc-gre, Πήγασος, Pḗgasos; la, Pegasus, Pegasos) is one of the best known creatures in Greek mythology. He is a winged divine stallion usually depicted as pure white in color. He was sired by Poseidon, in his role as hor ...
and Gnome-Rhône 14M.
Variants
;Atlas I :Direct drive, maximum power at 1,950 rpm. ;Atlas IR : Geared drive (ratio 1: 1.625), maximum power hp at 1,950 rpm. Weight increased to .Specifications
See also
References
*Němeček, Václav. ''Československá letadla I (1918-1945) (Czechoslovak Aircraft I (1918-1945))''. Third edition, Naše vojsko, Prague. 1983. {{Walter aeroenginesAtlas
An atlas is a collection of maps; it is typically a bundle of maps of Earth or of a region of Earth.
Atlases have traditionally been bound into book form, but today many atlases are in multimedia formats. In addition to presenting geographic ...
1930s aircraft piston engines
Aircraft air-cooled radial piston engines