Amadee-20-TUMBLEWEED-JRP

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=== Details ===

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|**Acronym**|TUMBLEWEED-JRP

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|**Description**|Tumbleweed is the concept of a spherical rover to be

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deployed on Mars.

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|**Principal Investigator (PI)**|(((

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Julian Rothenbuchner | [[julian@teamtumbleweed.eu>>mailto:julian@teamtumbleweed.eu]]

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)))

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|**Organisation** |University of Technology, Vienna

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|**Co-Investigators**|(((

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Moritz Stephan, Stanford University; Wurlitzergasse 93/23, 1170 Vienna

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E-mail: [[moritz@teamtumbleweed.eu>>mailto:moritz@teamtumbleweed.eu]]

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Dominik Schmidt, University of Technology Vienna; Hietzinger Hauptstr. 69/3, 1130 Wien, :

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E-mail: [[dominik@teamtumbleweed.eu>>mailto:dominik@teamtumbleweed.eu]]

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Amelie Finan, University of Vienna; Bernhard Schilcher Straße 18, 2000 Stockerau

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E-mail: [[amelie@teamtumbleweed.eu>>mailto:amelie@teamtumbleweed.eu]]

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Josef E. Pürmayr, Sir Karl Popper school; Wiedner Gürtel 68, 1040 Vienna;

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E-mail: [[josef@teamtumbleweed.eu>>mailto:josef@teamtumbleweed.eu]]

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=== Summary ===

[[image:1628955738683-845.png]]

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Tumbleweed is the concept of a spherical rover to be deployed on Mars. They are designed to be spheres of a

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diameter of 5 m equator-wards by Martian winds. One Tumbleweed consists of a sturdy aluminum/composite

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outer frame and sails arranged to provide optimal air resistance. Solar cells on the sails provide power. Sensors

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and electronics are attached to the outer frame. The first Tumbleweed prototype was already participating in

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the AMADEE-18 mission. The research questions for the AMADEE-20 experiment can be summarized as:

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1) What is the performance of the solar cells perform under operational conditions? Specifically, what is

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the effect of the constantly changing illumination angle caused by the rover’s movement

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and different times of day?

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2) What is the distribution of abrasion on the Tumbleweed’s structure? Surface abrasion is

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expected to be one of the main factors limiting the structural lifespan of a Tumbleweed

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Rover. The aim is to find out more about the rate and distribution of this abrasion. The

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test shall be conducted in sandy as well as increasingly rocky environment.

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3) How does the Tumbleweed’s speed and direction of movement vary under different

wind conditions?

= Experiment Data =

|=(% style="width: 156px;" %)Date|=(% style="width: 1683px;" %)Files

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|(% style="width:156px" %)[[2021-10-15>>https://mission.oewf.org/archive_downloads/amadee20/TUMBLEWEED-JRP/2021-10-15/]]|(% style="width:1683px" %)(((

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pictures of wring issues

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)))

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|(% style="width:156px" %)[[2021-10-17>>https://mission.oewf.org/archive_downloads/amadee20/TUMBLEWEED-JRP/2021-10-17]]|(% style="width:1683px" %)repair pics

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|(% style="width:156px" %)[[2021-10-18>>https://mission.oewf.org/archive_downloads/amadee20/TUMBLEWEED-JRP/2021-10-18/]]|(% style="width:1683px" %)troubleshooting pics

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|(% style="width:156px" %)[[2021-10-19>>https://mission.oewf.org/archive_downloads/amadee20/TUMBLEWEED-JRP/2021-10-19]]|(% style="width:1683px" %)Pictures and Video

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|(% style="width:156px" %)[[2021-10-20>>https://mission.oewf.org/archive_downloads/amadee20/TUMBLEWEED-JRP/2021-10-20]]|(% style="width:1683px" %)2xVideo, 5 pics, POI.md

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|(% style="width:156px" %)[[2021-10-22>>https://mission.oewf.org/archive_downloads/amadee20/TUMBLEWEED-JRP/2021-10-22/]]|(% style="width:1683px" %)7 pictures

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|(% style="width:156px" %)[[2021-10-24>>https://mission.oewf.org/archive_downloads/amadee20/TUMBLEWEED-JRP/2021-10-24]]|(% style="width:1683px" %)2 videos

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|(% style="width:156px" %)[[2021-10-29>>https://mission.oewf.org/archive_downloads/amadee20/TUMBLEWEED-JRP/2021-10-29]]|(% style="width:1683px" %)1 video

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Wiki source code of Amadee-20-TUMBLEWEED-JRP