A replacement prototype for the La-172 was designated
La-174D (the suffix signifying dubler, literally "replacement"),
and entered flight test in August 1948. This differed
in only minor respects from the preceding prototype,
and series production was ordered during the
same month as the La-15, armament being reduced
from three to two 23mm NS-23 cannon, and 6° of
wing anhedral being added. The La-15 was powered by
the RD-500 turbojet, the Soviet series version of the
Derwent, deliveries to the VVS commencing in the late
autumn of 1949. Production plans for the La-15 were, in
the event, scaled down because of difficulties experienced
in manufacturing in sufficient quantity the
numerous milled parts employed in the structure, but several hundred were produced, these remaining in
VVS service until 1954. A tandem two-seat conversion
trainer version was evolved as the La-180, but only two
examples of this variant were built.
| Take-off weight||3850 kg||8488 lb|
| Empty weight||2575 kg||5677 lb|
| Wingspan||8.8 m||29 ft 10 in|
| Length||9.0 m||30 ft 6 in|
| Wing area||16.2 m2||174.38 sq ft|
| Max. speed||1025 km/h||637 mph|
| Ceiling||13000 m||42650 ft|
| Range||1170 km||727 miles|
|A three-view drawing (1640 x 1007)|
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Closely, about 400 were produced. The manufacture was cancelled because the famous MiG-15 was simplier and cheaper in production and had stronger undercarriage. The last attribute was very important, because many airbases in this time in Soviet Union had poor surface of runways. The performances of both aircrafts were closed.
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