The aircraft La-5FN - the improved version of fighter La-5. At creation of this airplane designers realized all actions on improvement of aerodynamics, recommended TsAGI on the basis of extensive researches in wind tunnels, have reduced a structure weight and have put new more high-power motor M-82FN (since 1944, ASh-82FN).
   The La- 5FN, perfectly kept in a steep turn and had not only high speed and a rate of climb, but also extremely good manoeuvrable data. The La-5FN have got on front in the summer of 1943 and participated in battle on the Kursk arc. Air fights have shown the superiority of La-5FN over the best modifications of German fighters. On the fighting capacity of La-5FN in 1943 became the strongest fighter of air fight on the Soviet-German front. It is possible to note N.Kozheduba's who has gained on the La-5 of 45 victories the most productive Soviet expert.
   In total, the fighters La-5 in different modifications were built in quantity 10003 during 1942-1944.