ive never saw my ostwind shooting down a plane lol. wont park a 100 fuel unit in base juts for AA purpose
well i have. ostwinds and centaurs are capable for frontline usage since theyre medium tanks and can sustain survive a pass from any plane. id rate AA units
1)Centaur (very reliable, high health, effective frontline unit)
2)OKW Flak HT (very reliable, 360 turret, low health but fairly cheap, should be kept in base or behind frontlines in late game)
3)USF AAHT (very reliable, not a 360 turret, same cons as OKW flak ht)
4)Ostwind (reliable, high health, effective as frontline unit)
5)222 (unreliable unless massed, 360 turret, low health)
Another thing to note is that almost all ostheer tanks have a pintle MG that can shoot down planes as well.