wanting formula for flight time

[charles johns]

is there a formula to figure flight time ?

[hoppy]

Flight Time = Battery Capacity(Ah) divided by Power System Amp Draw Times 60.

Example:
1200mah battery = 1.2Ah
Power System draw = 4A

1.2Ah/4A x 60min/h = 18min

[Wolfewind]

Battery capacity (ah) = mah/1000

[flypaper 2]

To many variables. If you push a batt. at full throttle, it will reach cutoff much sooner than at 1/2 throttle. Also you don't take all of a batts. rated capacity. This is where the big variations come in. I have a Kokam 640 ma. bat in a heli. After a run I put back in average 530 ma. which is very good. The 340 Kokam, I'm lucky to take 150 ma. out of it before shut down.

[charles johns]

thanks for the replys iam not to big on this computer thing but i do enjoy reading what everyone has to say thanks