Is is true that I can shoot down most these planes and they will be available for purchase? I found this on a site
To unlock the planes there is an ace placed in each mission that you must find and shoot down. Here are the planes and locations for each mission.
1. F-5 just north of the allied airbase
2. A-10 north of the enemy airbase
3. F-16 South of the second radar station(the westernmost one)
4. Mirage 2000 Northwest of the westernmost radar jamming plane
5. MIG-29 South of the far western pumping station on the map
6. F-14 North of the northenmost group of enemies on the map
7. TND-IDS North of the solar tower
8. F-18 after refueling during the mission the ace will appear to the east of the main combat area
9. F-15C North of the center beach combat area
10. RF-01 Far upper northwest corner of the map, northwest of the sub base
11. SU-35 The ace will appear with about 90 seconds left during this mission
12. F-2 North of the stonhenge gun base
13. F-15E After clearing the radar balloons, enemy fighters will appear, the ace is in the north east
14. F-22 Ace is in the north east of the map
15. EF-2000 Ace will be in the center of the map when the mission starts(between the two southern combat zones)
16. F-117 Ace is located northwest of the westernmost combat zone(Due to stealth sometimes hard to find, head 2 grids north and 1 west)
17. F-15A Ace is located in the far northwestern corner of the map, past the city
18. S-37 The ace is located north of megalith.