A friend of mine turned me on to what would become this month's LOOTM. I'm not usually a fan of high-wing aircraft for aerobatics or fighters, but there's something about the look of the Yugoslav Ikarus IK-2.
Built in small numbers between WWI and WWII, the aircraft saw limited service at the start of the European conflict until Yugoslavia's surrender in 1941. However, it was outclassed by aircraft of superior performance but soldiered on beside its stable mate, the IK-3 (a low-wing retractable-gear monoplane).
Normal take-off weight gave the aircraft a 5:1 weight-to-power ratio--good enough for decent performance (~3000 fpm climb and ceiling of 34,000+ feet). It was armed with one 20mm cannon and two forward-firing machine guns. But the striking features of an in-line engine paired with gull wings give the aircraft an elegant, sleek, purposeful look.
The LOOTM for May, the Ikarus IK-2.