Flying Wind Turbine Demonstrator - Extended Cut

Описание к видео Flying Wind Turbine Demonstrator - Extended Cut

Cut version of test flight for different angle of attack controllers (not shown in this video). Complete system flight test, with all modes of operation.

Flight conducted completely autonomously, only high-level commands (such as "hover now") were given.

0:00 Intro
0:10 Take-Off
0:38 Reel out Tether
1:04 Rotate Landing Perch to Back
1:27 Trans-In
1:44 Figure Eight Flight
3:03 Trans-Out
3:32 Rotate Landing Perch to Front
4:03 Reel in Tether
4:46 Landing

Kite size: 2.4m wingspan (1:4 scale of 100kW product).
Location: Oberbiberg near Munich, Germany
Date & time: 21 March 2023, around 1 pm.
Name of kite: SN8 "Stiffy" (due to upgraded, stiffer tail)

Additional chapter information:
Take-Off. In-between flights the kite is parked on the landing perch on the ground station. Once conditions are suitable the kite goes into hover flight, undocking from the ground station.
Reel out Tether. While in hover, the tether is reeled out from the winch on the ground station. The tether attaches the kite to the ground station mechanically and feeds electricity to the kite during hovering.
Rotate Landing Perch to Back. The landing perch is rotate to the backside of the ground station during figure eight flight to free up the space between the ground station and the kite. This way, the tether can move freely.
Trans-In. Once the tether is complete reeled out from the winch, the kite accelerates into figure eight flight mode.
Figure Eight Flight. During figure eight flight, the kite can produce energy, which then reverses the power flow: The onboard propellers (the same that were previously used for hovering) are now used as small wind turbines and produce power aboard the kite. The kite harvests the energy from the wind. During this mode the kite feeds electricity to the ground station and the grid.
Trans-Out. When the flight has to be terminated, e.g., due to a change in weather conditions such as too low wind, the kite transitions out of figure eight flight and back into hover flight.
Rotate Landing Perch to Front. To reel in the tether, the landing perch is rotated to the front again, catching the tether and thus, making sure it is winched correctly.
Reel in Tether. While the kite maintains hover flight, the tether is reeled in, onto the winch.
Landing. Once the tether is reeled in completely and the kite's landing hooks docked to the ground station, the kite ramps down its propellers. It is now securely parked and ready for the next flight.

This approach allows us to harvest the energy from the wind more efficiently than conventional wind turbines, because we only use around 10% of the materials. For more information and explanations, please visit https://www.kitekraft.de.

Music credits: Liquid Memoirs - Waking up in Limbo (https://artlist.io/song/80916/waking-...)

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