07-11-2012, 08:39 PM
hi Wayne . i had some discussion with Claudio about this .
heres what he suggested , and i have found it quite good .
you ideally want to land with 20% left in your battery pack .
so if you have a 4000mah battery pack , you dont want to use more than 3200 mah .
if your landing with 3.8v per cell , after a fully charged flight . . put your battery on charge and see how many MAH IT TAKES TO FULLY CHARGE AGAIN . WONT TAKE LONG TO WORK OUT what your volts are on stanby as to how many mah it takes to charge .
using this formula several times and getting as close as possible to it , by adjusting flight times ( mixed flying ) i have found with 20 % left each cell is around 3.75v to 3.80v. incidently the lowest i landed with was 3.34 v per cell thats almost dead flat and the plane showed no sign of weakness , it was ready to fall from the sky . once you go below 3.7v per cell it will drain quickly . but as claudio suggest cells can sustain 3.8 volts under load for some time . hope that helps .
safe 3.8v per cell after landing with some to spare . 3.7v per cell is game thats what id expect to land at after 2 failed approaches or 1minute coasting . HOPE THAT HELPS .
heres what he suggested , and i have found it quite good .
you ideally want to land with 20% left in your battery pack .
so if you have a 4000mah battery pack , you dont want to use more than 3200 mah .
if your landing with 3.8v per cell , after a fully charged flight . . put your battery on charge and see how many MAH IT TAKES TO FULLY CHARGE AGAIN . WONT TAKE LONG TO WORK OUT what your volts are on stanby as to how many mah it takes to charge .
using this formula several times and getting as close as possible to it , by adjusting flight times ( mixed flying ) i have found with 20 % left each cell is around 3.75v to 3.80v. incidently the lowest i landed with was 3.34 v per cell thats almost dead flat and the plane showed no sign of weakness , it was ready to fall from the sky . once you go below 3.7v per cell it will drain quickly . but as claudio suggest cells can sustain 3.8 volts under load for some time . hope that helps .
safe 3.8v per cell after landing with some to spare . 3.7v per cell is game thats what id expect to land at after 2 failed approaches or 1minute coasting . HOPE THAT HELPS .
patience !! paaatience !! paaaaaatience paaaaaaatieeence dooooohhhh !!!
DANGER WIFE CAN READ FORUMS . love you darling . sig changed .