upside down flying with standard props

by Teletubbie | July 3, 2013 | (10) Posted in Challenges

COMMENTS

zev on July 3, 2013
wait, what? so I guess it is super inefficient upside down, right?
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craftydan on July 3, 2013
take a closer look. each pair of props is flipped over -- one set to run up, the other set to run down.

in effect, the props will be equally efficient/inefficient on either side.

TT, from the stills it looks like the efficient prop is always be under the inefficent one. Have you tried it the other way?

I'd think the efficient prop getting the freshest slice of air would work best (but nothing beats experience).
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Teletubbie on July 4, 2013
Good point, I even want to mount one prop not 90 degreed but more to the back to give the attacking prop more clean air. Yes the proof is in the pudding. :-)
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Teletubbie on July 4, 2013
No, I notice almost non los. I was surprised to but because I reverse the direction when upside down, the prop are always moving in their correct way.
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twan1997 on July 3, 2013
This is so awesome and creative but it's still hurting my brain.... :/
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panther3001 on July 3, 2013
Are you switching the prop direction mid-flight to get the thrust reversal? What kind of ESC/Flight Controller are you using to do this? Or did you design something yourself?
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Teletubbie on July 4, 2013
On the web you will find MulitWii 3d ESC firmware, this is modified SimonK firmware
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ecoster on July 3, 2013
Nice!! I've seen a lot of quad video's but this is the first I've seen that goes inverted, how do the gyro's react to the inverted flight?
Gr
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Teletubbie on July 4, 2013
I use a Naze32 with modified Multiwii firmware for 3D flying.
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Cyberdactyl on July 3, 2013
I wonder what kind of somersaults was needed to get those props even somewhat balanced.
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Teletubbie on July 4, 2013
Balancing :-), I balanced each prop but I did not balance them together on the motor, First I wanted top test it. I had no vibration on the arms so I left it.

You need to have stiff props, I used Gaui ones and gives you a nice sound but to much flex.
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Renceww3 on July 7, 2013
only dutch people can think off this xD
awesome work fellow amsterdammers!
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upside down flying with standard props