A North American P-51 Mustang replica aircraft. Says it all on the tin, really...
1080p Image can be found in 'Images' due to the image in this description was bugged out. (Thanks for the info ZeldoKavira :P)
EDIT: Huzzah the image now works!
Full information about the original WWII fighter can be found on the Wikipedia page here: http://en.wikipedia.org/wiki/North_American_P-51_Mustang
Mods Required:
Retro-Future Planes: https://kerbalstuff.com/mod/111/Retro-Future Planes
TweakScale: https://kerbalstuff.com/mod/344/TweakScale - Rescale Everything!
Ferram Aerospace Research: https://kerbalstuff.com/mod/52/Ferram Aerospace Research