Antonov An-4
1950
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  METEOROLOGICAL RESEARCH AIRCRAFTVirtual Aircraft Museum / USSR / Russia / Antonov  

Antonov An-4

An-4 is the design bureau designation for the An-2ZA, a variant of the An-2 intended specially forthe role of high-altitude meteorological research with a glazed position immediately in front of the tail fin for an observer. The ZA suffix stands for Zondirovanie Atmosfery, translatable as 'air sampling'. The ASh-62IR engine has a TK supercharger mounted on the starboard side of the cowling. This arrangement enables the An-4 to maintain power up to an altitude of 10,000m. The spinner of the An-2 standard model is deleted to aid engine cooling, and the original ailerons have been replaced by an unslotted variety.

Comments
jack, 18.06.2011

The spinner of the An-2 standard model is deleted to aid engine cooling, and the original ailerons have been replaced by an unslotted variety.

, 18.06.2011

Antonov An-4

Alexis de Troit, 30.04.2011

Is the An-2 the largest single engine bi-plane? I'm told that it is.

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