I recreated many of the US's X-planes, a set of military and space experimental aircraft. Each had a specific scientific purpose, and most can be reasonably modeled in KSP. This video shows the ~36 craft I was able to make with the stock game.
thread here http://forum.kerbalspaceprogram.com/threads/126869-US-X-planes-pack?p=2043522
download here https://www.dropbox.com/s/179dd93ooqozz1k/X-planes.zip?dl=0
