To all quadrocopter pilots:
Why not to carry the flight energy from ground to the helicopter
via the antenna wire(s)? At the end of WW2 the German navy
developed a helicopter antenna for portable use on VLF consisting
of a bulky 3 phase AC motor with two counter rotating rotors and
some stabilizers being fed by three antenna wires from three
isolated hoist gears in a triangle array at ground. Separation
between AC power and VLF by high pass filters, maximum flight
height about 1200 m! (*) Fortunately this arrangement didn´t come
into use anymore - probably it was a last act of desperation.
Furthermore the antenna shape was not optimum due to unfavourable
distribution of capacity. 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
www.qrz.com/db/dk1is
(*) see "Hubschrauberantenne" in Hille, Karl H.; Krischke, A.: Das
Antennen-Lexikon; Baden-Baden 1988, ISBN 3-88180-304-1
Am 04.08.2013 16:02, schrieb Warren Ziegler:
