I would like to apologize straight away, but this is a holy war... GA aircraft.

[zapatista]

Originally Posted by FPSOlkor

Which of four GA airplanes were in your opinion more effective? Whats your basis?

effective: n adjective, producing a desired or intended result.

i am the only one that voted for the stuka so far

the stuka was purpose built to be a ground attack aircraft with a specific objective in that strategy, the pinpoint bombing of ground targets. as such it was extremely effective and without it the fast moving sweeps that the german armored units did would have been much less effective, maybe even impossible. but the stuka was dependent on air cover by its own german airforce, and without air dominance it was extremely vulnerable, such as during BoB when the english pilots had "stuka parties" which was like shooting fish in a barrel.

since your question asks about GA in the plural, you'd have to include the il2. again purpose built as a GA aircraft, but rather then pinpoint bombing its role was as a more general GA aircraft that was aimed at dealing with armoured vehicles or enemy targets that had light AA protection. with its very heavy defensive armor and several large caliber tank-killing forward firing guns, resulting in a "flying tank" aircraft that was good at both tasks. but being slow and heavy, it was also very dependent on appropriate aircover, and without it it wouldnt have lasted long. many of the high scoring german aces on the eastern front obtained their high scores by shooting down vulnerable aircraft like the il2 (until it got a rear gunner in its later versions, and by which time aerial forces btw germany and russia were fairly equal)

both those aircraft were good at what they were intended for, but had a somewhat different purpose. so if you ask "which is more effective", you'd have to specify as what because air to ground has different aspects, and each of those aircraft was good/better/best at some of those functions. the modern version of the il2 is probably something like the A-10, and the modern version of the stuka is probably a laser guided bomb that can fly down the chimney of a specific building

both the FW-190 and "any soviet fighter" are excluded from this question because they were not the major planes used in a GA role and were not built for that purpose (obviously variants existed that had that capability, and modifications were made at certain times so they could be used in a air to ground role).