Cheshirecat
Member
I have been flying my SJX4 with 2 X 8300 mAh 6S and have decided my Bingo voltage is 22.4 Volts, So when i see this on the down link i bring her in and land.
This is after around 8-9 Mins with the all up weight (Z15 and NEX7 Onboard) a mix of hovering, non aggressive maneuvering and climbs to around 85 Meters.
When i put the LiPos on Charge my Graupner chargers is putting back at most 4500 mAh, more often 3500-4000. So i am clearly not making the most of the batteries.
But after a lot of initial research on LiPo cells i learned that they are 80% Discharged at 3.72 - 3.74 Volts and i went safe at 3.74 per cell hence 22.4 Volts for the 6S Pack but after several flights have never put back more than 4500mAh in each pack so not even getting to 60% capacity.
I figured the only scientific way of really knowing where the LiPos are at in flight is to measure the current drawn in real time and i have purchased the telemetry upgrade from Andrea Baier for the Herkules. I use Futaba radios and have not fitted this yet and will not until i re wire my Zenmuse connections for easier mounting and connection in the field, Also i am not 100% sure i can expect the telemetry to send the readings to the Futaba TX display in real time or it just records this to the on board SD card.
In the meantime i want to keep flying and practicing so trying to work out what i should consider my Bingo voltage on the packs in flight.
What do 6S flyers consider the 80% Voltage to be under load? what have you got set in your WKM assistant as the trigger values and at what voltage do you say that's it i'm coming in? i am reluctant to base it purely gradually extending the flights and monitoring the charge put back as it does not take into account varying flight conditions and how hard the rig is working at the time.
This is after around 8-9 Mins with the all up weight (Z15 and NEX7 Onboard) a mix of hovering, non aggressive maneuvering and climbs to around 85 Meters.
When i put the LiPos on Charge my Graupner chargers is putting back at most 4500 mAh, more often 3500-4000. So i am clearly not making the most of the batteries.
But after a lot of initial research on LiPo cells i learned that they are 80% Discharged at 3.72 - 3.74 Volts and i went safe at 3.74 per cell hence 22.4 Volts for the 6S Pack but after several flights have never put back more than 4500mAh in each pack so not even getting to 60% capacity.
I figured the only scientific way of really knowing where the LiPos are at in flight is to measure the current drawn in real time and i have purchased the telemetry upgrade from Andrea Baier for the Herkules. I use Futaba radios and have not fitted this yet and will not until i re wire my Zenmuse connections for easier mounting and connection in the field, Also i am not 100% sure i can expect the telemetry to send the readings to the Futaba TX display in real time or it just records this to the on board SD card.
In the meantime i want to keep flying and practicing so trying to work out what i should consider my Bingo voltage on the packs in flight.
What do 6S flyers consider the 80% Voltage to be under load? what have you got set in your WKM assistant as the trigger values and at what voltage do you say that's it i'm coming in? i am reluctant to base it purely gradually extending the flights and monitoring the charge put back as it does not take into account varying flight conditions and how hard the rig is working at the time.
