I have found a bug, tested with Diamant and a custom build.
I start with the Diamant, winch start to 100m, pull down to gain some speed. Then pull up 90degrees untill the plane stalls. At this point the plaine should fall untill enough speed is gained to create lift. Sometimes it works. Other times the plaines gains speed to 60m/s after falling for only a few meters. This happens in Alpha 8.5.
Anything I can do to help get this fixed?