As you can see, my helicopter skillls are very beginner, however, I only crashed once the helicopter disappeared! No idea what time into the track that was.
I doubt I'm out of system resources - my system is a fairly new install, very little rubbish and I take performance optimisation seriously (having managed 2000+ servers in the past). No other indications of resource problems.
From my read the graphics glitched, view of helicopter disappeared.
If it happens again I'll try and get a time ... what other info would be useful to you?