The challenge is to fly a Spitfire MkV through the square fighter hanger door. Either way through does not matter.
What is important is that your wings are perfectly horizontal or within 1 degree. Diagonal passes do not count as this widens the gap. Film the attempts and take a screenshot to confirm it.

As you can see it is a very tight fit when the wings are level. If anyone does it inverted with wings horizontal they win outright


Here is a 30 second .ahf film also incase you suspect trickery
Hanger Passgood luck and dont give up easy if you expect to succede in this noble challenge!
Salute