>So this means it was designed for such, but didn't do much in actual practice ?
From what I've read, I'd say the Skyraider was probably replaced as a strike aircraft by the jets of the time.
In the support role, my impression is that attacks were usually made against targets that were difficult to recognize, so the classic dive bombing attack from great altitude with dropping all of the ordnance in one go was probably out. Additionally, the aircraft apparently were often armed with a wide variety of different weapons ("supermarket load-out", it was called in one account), which would have different trajectories and required different attack methods.
That often meant several runs if all the ammunition was to be expended against a single target, and as the Skyraider wasn't that good a climber while carrying loads, you'd probably not use the dive brakes on the way down, because that would mean a climb back up to attack altitude would take longer as the brakes would have killed some speed you'd otherwise could have used for zooming back up again.
However, I have no statistical information, that's just stuff I read somewhere ... maybe even online, but it's been too long to remember exactly. Googling did not help. If you know a search engine that can do boolean operations (like "Skyraider AND Supermarket"), I'd appreciate a recommendation.
Err ... here it is, Google found it. Apparently, "Supermarket Skyraider" gives different results from "Skyraider Supermarket". Bad idea if you ask me.http://a-1combatjournal.com/journalset/jrnChap3.htm
Look for "Supermarket" on the page. Also interesting: The bit on "switchology".