I don't think it's specific to F15c, it's happening on alot of planes. I've made my own missions with the mission editor and this has happened on Mig 15s, Mig 21s. I even downloaded a Civilian aircraft mod and filled the sky with airliners over Las Vegas. I was shooting them down with Missles and even they will on occassion take 3 or more missles to go down. Sometimes the missles seem to have no effect on any aircraft. Surely they know about this bug by now. I'm using 2.5, this doesn't happen in the previous versions does it? (The versions that were official releases, not beta)