Easy to mass produce, these were surpassed by every other monoplane in every way. Except for turn fighting, which is not a mechanic in this game.
These are supposed to be used as scouts or harassers so this will be it's stats:
Biplanes:Cost:2
Hp:10
Attack:6
Armor:0
Expl:0
Speed:6
Sight:6
USSR: I-153 or Po-2
Nazi Germany: He-50
U.S.:F3F
U.K:Gladiator