How high can the small electric helicopter fly at? Someone asked me about this when they saw me fly T-rex in front of our institute's building.
All I can say is only "Oh, very high, far beyond you can see it."
On December 1st, 2006, our lab went to the Southern Cross-island Highway for calibrating one of our altimeter. I took the T-rex with us because I just curious about the performance of T-rex at high altitude.
After the flight test, I can tell you "It still perform good for hovering at 2280 meters high." At that height, the air density is 80% of that at sea level.