Btw, you should watch Iron Sky, if you haven´t done so yet.
I know that movie! isnt it about an German invasion to the earth in some UFO´s? in wich they were hidden in the black side of the moon waiting for nowadays to invade?
Man i would love to watch that movie! but wen i first listened about it, i tough it was canceled or something (i guess some company refused to distribute the movie, or something like that... im not sure, all i know is than the movie was done, but it couldnt be watched).. is the movie able to be purashed/watched?
Also i dont believe in everyting i see on a random internet post... but its just than this think pulled out "mein" mind... and so i didnt only searched on the wikipedia, but yet in many other random webpages as well... and yeah, i guess the prototypes were build, and germans must have actually managed to make flying test... but
FROM WHAT I THINK IT REALLY HAPPENED: the germans found out than the "aircraft" would spare a lot of resourses (by that i mean fuel, or the energy they used to move that aircraft) and since they builded the Haunebo so it could reach those incredible speeds, it wouldnt make sence to make such piece of aircraft flying at low speed (since it would be an easy target, and the only efective way for that aircraft to be used is going on those supersonic speeds, otherwise is a sitting duck in the sky)
Eventualy, the project were from 39... so 6 years passed, and in 45 Germany had already the war lost... The nazis did worried about burning and making the projects disapear... hoewer, since the hauneabu project was something old made at the start of the war, and since it was forgotten on that time due to the expensiveness of its constuction, in 45 there wasnt much documents about that haunebu... and the few who apeared, were the ones wich nazis didnt gave importance in 39..
You know, maybe the nazis had an lot of more aicraft and similar devices than NOBODY even discovered... not because those projects were burned by them, but yet because they were forgotten projects (ex. too much expensive, impossible to do at a bigger scale, ect...)
What we know today about the haunebu, were the documents ignored by the nazis in 39... and NOT documents who survived the "post-war nazi hidding data"..
(note than this is MY opinion after i readed some random stuff on the internet, and since theres not an acurrated 100% explanation about this.. it seems kinda logical for me.. and no, i dont even believe hitler stills alive in mars, or than the germans sent an suicide mission to mars with those UFO´s... thats far away from the truth afaik)