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Date: Mon, 05 Aug 2013 15:25:03 +0200
From: =?ISO-8859-1?Q?Stefan_Sch=E4fer?= <Stefan.Schaefer@iup.uni-heidelberg.de>
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Subject: LF: Quadrocopter antenna
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Am 04.08.2013 17:52, schrieb DK1IS:
> [...]But with nowadays quadrocopters and a "little" reduction of the 
> demands it should be possible to feed them from the ground with DC (or 
> AC plus converters for reduction of current) via 2 wire line and 
> having a good antenna too.
>
> 73,
> Tom, DK1IS

That's it! So, Markus, could you ask your friend abot some technical 
details? What is the supply voltage of the system and power consumption 
(or lifetime at a certain battery charge)? Is it possible to lift 1 kg 
and how does it change the power consumption? It should be no problem to 
feed DC to the system or a compact power supply in the sky and normal 
230V mains at ground (todays PSUs have an input voltage range of 
85...240V AC, so a certain voltage drop on the thin wire should be no 
problem.
Maybe you can do some tests?

The advatages are clear. A quadrocopter keeps the position and height, 
even in smaller wind blasts while a balloon bounces left and right. The 
costs of Helium will quickly overcome the costs for a quadrocopter. Ah 
and such a project is simply more interesting i guess :-)

73, Stefan/DK7FC

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Am 04.08.2013 17:52, schrieb DK1IS:
<blockquote cite="mid:51FE78BA.9040603@kabelmail.de" type="cite">
  <meta content="text/html; charset=ISO-8859-1"
 http-equiv="Content-Type">
  <div class="moz-cite-prefix">[...]But with nowadays quadrocopters and
a "little" reduction of the demands it should be possible to feed them
from the ground with DC (or AC plus converters for reduction of
current) via 2 wire line and having a good antenna too.<br>
  <br>
73,<br>
Tom, DK1IS<br>
  </div>
</blockquote>
<br>
That's it! So, Markus, could you ask your friend abot some technical
details? What is the supply voltage of the system and power consumption
(or lifetime at a certain battery charge)? Is it possible to lift 1 kg
and how does it change the power consumption? It should be no problem
to feed DC to the system or a compact power supply in the sky and
normal 230V mains at ground (todays PSUs have an input voltage range of
85...240V AC, so a certain voltage drop on the thin wire should be no
problem.<br>
Maybe you can do some tests?<br>
<br>
The advatages are clear. A quadrocopter keeps the position and height,
even in smaller wind blasts while a balloon bounces left and right. The
costs of Helium will quickly overcome the costs for a quadrocopter. Ah
and such a project is simply more interesting i guess :-)<br>
<br>
73, Stefan/DK7FC<br>
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