Tethered helicopter
A tethered helicopter is a helicopter that does not fly freely, but is connected to the ground with a tether during use. Tethered helicopters can be used for the same purpose as tethered balloons . The advantage over tethered balloons is that they do not require filling gas and that they can be controlled and are less susceptible to wind.
Their energy consumption and noise generation are to be regarded as disadvantages. Tether helicopters can be operated by an electric motor , with power being supplied via a cable inside the tether.
history
At the end of the 1930s, the Telefunken company carried out a transmission experiment with an antenna that was to be carried by a tethered helicopter to a height of 1000 meters, the tethered helicopter being driven by a three-phase motor. However, due to electrostatic charges, some fuses responded when the tethered helicopter reached a height of 750 meters, so that it landed roughly.
See also
Individual evidence
- ↑ Long-wave and long-wave radio, Gerd Klawitter, Siebel Verlag, ISBN 3-922221-48-3