In our Tri-Tiltrotor VTOL “Mozart” we have now (>100 flights) killed several expensive high-performance batteries without ever having demanded power beyond specified limits. Unfortunately, Li-ion batteries age very quickly when high power rates are demanded at the end of the capacity. We think, this is a fundamental problem of VTOLs, because for vertical landing at the end of the flight (and of the battery capacity) you need again full power.
Following an idea of my colleague @Walter, we have supplied a Quad Conversion of a Mini Talon with two batteries (like @Pompecukor did at lest one year before): one battery optimized for the quad motors and hovering, one lower c-rated but higher capacity battery for the forward propulsion.
The diagram shows the wiring with two power modules on a conventional Pixhawk.
From the second powermodule, only the voltage and current sensors are used and fed to the 3.3V AD inputs (BATT2_VOLT/AMP_PIN = 13 and 14) of the pixhawk.
„Today we enjoyed the second flight, without having to worry about the plane could not have enough power for vertical landing at the end of the flight.“
Gut formuliert! Wir haben uns auch keine Sorgen gemacht.
War halt eine gezielte Notlandung, nachdem wg. Unwetter der homepoint nicht anfliegbar war.
Spass beiseite. Deine Landung war genial. Du hast auf diese Entfernung die Motoren zum optimalen Zeitpunkt abgestellt haben. Es waren keine einzige Grasspuren an den Propellern. Und er hat mit fast Null Vertikalgeschwindigkeit auf den Ähren aufgesetzt.
Die gesamte Hoverzeit war ca. 150 sek!
Geschuldet der nicht geplanten RT und der Kompass Schwäche.
Das war natürlich zu viel, bei geplanten 25 sek Start und 40 Sek Landung.
LG Walter
Do you use also two batteries? Hybrid as 2 different kind of sources has been known to me. Sorry, if the “innovative” is too pompous - should not be meant, but perhaps usefull to trigger discussion and exchange of experience with smaller airplanes with 2 batteries.
Yes. Just as you described in you diagram.
You are right Hybrid could be eletric gas. But im this case I meant lipo and li- ion together. That is im the quadplane in the video.
Looks really well you do the same as me FBWA to QHover and let if slow down. I will have to try my transitions a bit lower next time .
What camera are you using for the on board footage
