Blazing Angels

This achievement is unlocked when you have earned all 42 planes, and you start off with the first plan right away. You can earn two planes per mission, but you need at least a 3 out of 5 rating in order to get both. This will give you 38 planes. The 4 remaining planes(2 fighters, 2 bombers) can be earned through the mini-campaign which is unlokced upon beating the normal campiagn. There are six missions in each mini-campagn and a total of 2 mini-campaigns. For the 2 remaining bombers finish the bombing campaign and for the fighters do the dogfight campaign. You can check how many palnes you currently have by going to "stats" then going into your hangar. There it will show all your planes and all the missing ones will appear as shadows.