Flight time for my elec jet?
 

I have a Freewing Rebel 70.
Specs:
Motor: 3000KV
ESC: 50A
Batt: 14.8V 2500MA 30C

What is a good flight time w/o blowing up batt?

Thanks, Rich

The only true way you can begin to calculate a likely flight time is to measure the actual full power current with a suitable watt meter.
If you don't have one the alternative is to do a brief (1 minute) flight and accurately record the actual time. Then measure how many mAh the charger puts back in. Comparing this figure to the battery capacity will tell you how much longer you could fly but remember to protect the LiPo you should really not use more than 80% of its nominal capacity.