Walkthrough:ACES Semifinals
"ACES Semifinals" is a job for Sly Cooper in "Flight of Fancy" of Sly 3: Honor Among Thieves. The goal is to defeat Teams Iceland and Belgium in the ACES semifinal round to qualify for the finals.
Walkthrough
This mission is your opportunity to familiarize yourself with the biplane controls. 
fires your turrets, 
hits the throttle, 
applies the brake and 
allows you to perform a loop-de-loop. Additionally, 
and 
are used in conjunction to perform dodge maneuvers, such as barrel rolls and 180° flips. These moves prove quite useful for dodging enemy fire, as your opponents have rear-machine gunners, which can make it a bit difficult for you to trail from behind.
You will need to shoot down 25 planes. If you run out of ammunition, fly under the bridges to restock. Also note that you must shoot down an enemy yourself for it to count. It will not count if two of your opponents crash into each other.