Simply put, this is a replica of the Arkbird from the Ace Combat series. 100% stock, by the way.
Coming in at around 300 parts, it's a big, wobbly plane at low altitudes, but above 7km, it turns into a graceful, elegant piece of engineering that I am incredibly proud of! :D
Instructions for flying:
Stage and takeoff from the runway at around 115 m/s. It will accelerate fairly quickly but it gets close to the end of the runway before it can takeoff.
Once you get up to 7km it will become more stable, until then its wobbly.
Its flight ceiling is about 26 km, and will fly at speeds up to 1626 m/s at that altitude (tested by Spootyman on KSPTV)
Fuel balancing is a little off, so before coming down from altitude make sure to shift fuel forward. It also has a broken fuel line but if you fly for less than 30 minutes it won't be too much of a problem.