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Permalink Reply by Michael Müller on July 2, 2012 at 5:35am

Maybe you mounted one prop upside down. Printing must be on the top. Otherise it has only about 40% thrust and makes this noise.

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JDronesPermalink Reply by Jani Hirvinen on July 2, 2012 at 6:14am

yeah sounds like you have prop either mounted upside down or it's on "wrong" motor and spins backwards. both will create funny tunnel kinda sound and also bad lift. dont fly before checking

always check that air flows down under propellers.

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Permalink Reply by x-air71 on July 2, 2012 at 6:41am

Hi Micheal and Jani, I'm pretty sure the printing is over...but since I've touched some cable it may be I've connected them in wrong way (I mean from esc to motor) I will double check this evening!

Another question, after uploading the latest firmware (2.6 mav 1.0) I have the impression the minimum throttle available was much higher than before. Could it be? How could I re-arrange it to a proper range?

 

Thanks! I will tell you

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Permalink Reply by Michael Müller on July 2, 2012 at 6:50am

Here is a thread about the changed min throttle and how to change it.

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Permalink Reply by x-air71 on July 2, 2012 at 7:14am

I will check it. Tnx

One further question, my hexa has 880 motors and 12x4,5 props.

I will have an additional payload of 800 grams, not including the 2 batteries (turnigy nano 4000 mha each, other 600 grams more or less).

Do you think the hexa could carry all this weight having a reasonable autonomy?

 

Marco

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Permalink Reply by Michael Müller on July 2, 2012 at 8:04am

You can calculate it here. Or you can measure the thrust of one motor and multiply it by six. If your thrust is at least 2 or better 3 times higher than your lift off weight, than it is ok.

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Permalink Reply by x-air71 on July 2, 2012 at 11:31am

Hi all, you were right....the motor was spinning in the wrong direction...stupid me...I've tried to fix better the cables since they tend to unplug, expecially during hard landing...and connected back in wrong sequence....

I will have to fly in a windy environment (25-30 km/h) do you have any special suggestion?

Any PID regulation that could improve the hexa stability?

Here I am during maiden flight

@MIchael, I've already seen the site, really well done and interesting. I will consider the proportion you suggest.

Tnx

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