That machine might manage low-speed/high altitude but that is all. A real sub-orbital aircraft would need swept or delta wings to deal with the high-speed airflow
I found this video a while ago:
The German OTRAG project also comes to mind , they had a rocket range in Congo:
http://www.b14643.de/Spacerockets_1/West_Europe/OTRAG/Description/Frame.htm
Nice! Planned apogee of 36 km, so would not have been a space rocket even if successful. (for those who don't have time to watch the video, actual apogee = 0 km... I wish the Congolese researchers the persistence that will lead to eventual success.)