stevem Senior Heliman Location: Oklahoma
| 1000ma (1A) is perfectly fine for the E-Tech 1200 cells - it's what I use.
If you don't have a programmable low voltage cutoff, then fly until you see the power really sag, then land. When you pull the battery off the Hummingbird and measure, it should be no less than 6V for a 2 cell pack (3 volts per cell). Under load it can drop to 2.7 or even 2.5, but will come up to 3v per cell after the load is removed.
Just check the voltage the first few flights and get a feel for when it's time to land by how the heli acts.
Good luck!
Steve |