I came across this video on my youtube feed today. How is this kind of endurance possible with standard LiPos? The last best flight time of 45 min was achieved by Holger Buss with his hexa mikrokopter if I'm not wrong. Can anybody shed light on how microdrones managed in excess of an hour?

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Comment by Ellison Chan on February 12, 2012 at 10:23am

Very efficient motors, coupled with the optimum size propellers for this motor speed.  Hovering only, will save on batteries.  And they probably chose the best battery, with the best life out of the batch.

This is a record attempt with no wind, like outdoor flying has.

If you want to see some discussions on motor efficiency, check this discussion out at AeroQuad.com :

http://aeroquad.com/showthread.php?4528-a-problem-about-power-syste...

Comment by Russell - ScoutUAV.com on February 12, 2012 at 10:51am

They are also running 12.2Ah and 18.3Ah (depending on model) Lipo batteries.   Those are 6 times larger than what is typical used on most quadcopters.


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Comment by Graham Dyer on February 12, 2012 at 11:23am

...low C rated LiPo batteries too, 4-6C are much lighter than the 20-40C's we use


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Comment by Gary Mortimer on February 12, 2012 at 11:33am

I reckon 12 hours was better. But sort of cheating of course.

http://www.suasnews.com/2010/10/2620/ascending-technologies-and-las...

Comment by David M Eno on February 12, 2012 at 1:39pm

My friend is looking for some low C batteries for his roomba project does anyone have a source ???

Comment by Jack Crossfire on February 12, 2012 at 3:47pm

They invested a huge amount of money in molds, vacuum bags, & autoclaves to manufacture the most optimum CF propellers.  Volume isn't high enough for them to replace the plastic EPP crap we have to settle for.

Also, 45 minutes would be the battery destruction time.

Comment by Rana on February 12, 2012 at 7:05pm

1 hour, 28 min is unbelievably great endurance for electric and that is too a quad !

Comment by Martin Szymanski on February 12, 2012 at 7:17pm

I thought forward motion with any copter even helis is more efficient getting new undisturbed air?

Comment by Rana on February 12, 2012 at 7:25pm
Comment by Ellison Chan on February 12, 2012 at 7:35pm

Rana, the parallel packs give more amp hours, but you are going to be carrying a lot of dead weight around as the battery starts to drain.  Up to a certain point, there's just no more use in adding more parallel cells, and the additional weight.  What could be possible is that the quad jettisons the empty packs, as they drain.  That could free up weight some of that weight.

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