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.
Gautier
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?
Regards
Karoly
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...
Regards,
Gautier Hattenberger
for Enac UAV Lab
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