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Re: [Paparazzi-devel] ROTORCOPTER FOR 500g camera

From: antoine drouin
Subject: Re: [Paparazzi-devel] ROTORCOPTER FOR 500g camera
Date: Fri, 16 Sep 2011 11:59:07 +0200


On Fri, Sep 16, 2011 at 11:20 AM, Christophe De Wagter
<address@hidden> wrote:
> [...] control matrixes in your motors.

aka asctec v1 protocol

On Fri, Sep 16, 2011 at 11:02 AM, Simon Wilks <address@hidden> wrote:
>The discussion around Y6 (tricopter coax) vs Hexa goes on an on but
>the high level summary seems to be if you want something portable and
>need a large field of view go for the Y6. For more stability the
>larger hexa is the better bet as you have more props evenly
>distributed around the center. Some think the coax setup causes a
>touch more vibrations but opinions on this vary widely.

In my opinion, the main concern about coax configuration is the
efficiency of the lower rotors, which, from working in the wash of the
top rotors is greatly reduced. The scilab script I made for computing
the mixing matrix assumes equal efficiency for all rotors. In the case
of a coax configuration, you'll probably need a different Ct for the
top and bottom rotors.



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