Hades Energy Problem

Hades Problem


Hades shows only very short flight time

For some kind of reason, the Smartdrone (Hades) shows a significant shorter flight time that the almost identical Hermes UAV.


Frame Propeller Cells battery mAH battery Weight Time to alarm Ampere
Hermes EPP1045 - 10x4.5 3 2x2200 1.590kg 15 min 50 sec ~ 17 A
Hades V3 EPP1045 CF - 10x4.5 3 2x2200 1.564kg 10 min 12 sec ~ 18 A

JETI shows strange voltage measurements


Inaccurate voltage measurement at Hades V2

A voltmeter shows 11.29 Volt (directly at the battery) after flying Hades V2 (motors turned off). The JETI monitor shows 10.2 Volt! Therefore, the alarm starts to early. Regarding this 1.1 Volt difference, the UAV should fly around 2min more.


Wrong voltage reference at some FlightCtrl V2.1

Usually the FlightCtrl uses a 3,0V voltage reference. But some FlightCtrl (from 10/2010 to 12/2010) feature wrong voltage reference of 3,3V. This results in reveference battery voltage, which is 10% too low.


Here the same with fixed voltage reference:


Frame Propeller Cells battery mAH battery Weight Time to alarm Ampere
Hermes EPP1045 - 10x4.5 3 2x2200 1.590kg 15 min 50 sec ~ 17 A
Hades V3 EPP1045 CF - 10x4.5 3 2x2200 1.564kg 14 min 50 sec ~ 18 A
Hades V3 EPP1045 CF - 10x4.5 4 9000 2.055kg 16 min 5 sec ~ 21 A

Check if your FlightCtrl has CSxx or a CRxx voltage reference. Here you see a CSxx with 3,3V, which results in wrong values.


Wombat

Use the Mikrokopter tool to fix it (start the configuration with pressed "ALT"-key).


Wombat