RE: battery duration
Spitfire,
4.8 volts is the rated voltage of the battery.
You can let your voltage drop to around 1 volt.
A lot of people have their own preferences ranging from about
.9 to 1.1 volts per cell.
If you figure each flight is 15 minutes and you are good for 3 hours
that would be 12 flights for the day. That sounds like a lot.
My flights are usually less than 10 minutes so that would be 18 flights.
Our wind comes up long before I could get close to those numbers.
Essentially, I think you're doing a lot of worrying for nothing.
Good Luck,
KW_Counter