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Re: [Paparazzi-devel] News of the world

From: Gautier Hattenberger
Subject: Re: [Paparazzi-devel] News of the world
Date: Sat, 07 Feb 2015 14:07:08 +0100
User-agent: Mozilla/5.0 (X11; Linux i686; rv:31.0) Gecko/20100101 Thunderbird/31.4.0

The motor consumption during the climb was about 200W, draining 20 to 30 Amps, which is fine for the speed controllers we have selected as long as they are cooled by the airflow. Because of the snow and the icy fog, we had to close all the air inlets to protect the electronic boards, thinking that an outside temperature between 0 and -10 would be enough.
Finally, it wasn't, and after 5 minutes of climbs, they were entering protection mode, limiting the power to about 100W.
We are now modifying the planes to add a cooling plate on the ESC, also in contact with the outside air.


Le 07/02/2015 08:21, Karoly Molnar a écrit :
Hi Gautier,

Looks very good! Could you please be a bit more specific on the ESC heating problem?


Date: Fri, 6 Feb 2015 16:21:08 +0100
From: address@hidden
To: address@hidden
Subject: [Paparazzi-devel] News of the world

Hello Paparazziers,

During three days this week, the Enac UAV team was at Atmospheric Research Center of Lannemezan (close to the Pyrenees in the south of France) for a flight campaign with Meteo-France. The goal was to prepare several meteorological planes for research studies that will be held next month in Cyprus.

Despite pretty harsh conditions, we have been able to fly several aircraft (Skywalker X6, Easystar, Funjet) at various altitudes up to 1400 m AGL.

Surprisingly our biggest issue was the heating of the ESC. The attached pictures speak for themselves why this was unexpected...

Also a video of a previous campaign at the same spot with a better weather:


Gautier Hattenberger
for Enac UAV Lab

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