by pldb64 » Sat Feb 18, 2012 1:50 am
Hi All,
As already noted, it is always possible to run a separate battery pack to power your rx, however i would have thought it was appropriate to mention the "good"/"recommended" approach to dealing with LIPOs and the importance of not running them down that far.
The general rule of thumb i've heard repeated in numerous forums is not to run your battery below 80% of rated capacity. (ie for a 2200mah battery, don't go below 1760mah). If you do go below this level, then you run the risk of ending the battery life prematurely.
So how does that impact your flying regime?
Well, you really need to know how many amps your pulling from your battery at WOT. From this you can work out how long your battery should last at WOT and this should give you some guidance as to what your minimum flight time can be without exceeding the 80% rule. If you then also work out how many amps you're pulling at 50% throttle, then you'll have a much better guide as to how long you can fly without overdoing it. Then set your timer to that duration and don't exceed it.
Then when you recharge your batteries, you can actually see how much you put back into the battery. That will allow you to fine tune what your maximum flight time will be. Golden rule - don't exceed 80% battery capacity.
For my AXN, i'm running a 2200mah battery and i'm pulling 16 amps at WOT. That means i've got a minimum flight time of 6:45. I'm using the ER9X software in my 9X so it allow me to set the timer based on % of throttle - so in reality i can fly for approximately 15mins without going over the 80% rule.
Anyone care to offer an refinements to the above?
Peter
Turnigy 9x, FrSky 2-Way/Telemetry DHT DIY, Smartieparts BRD, ER9x FW
AXN-Floater (stock esc, motor & prop, HK orange 9g servos)