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I hope this isn't too late, as I am in the Eastern Time Zone, and there was no mention about what time zone the contest uses for ending.

For this contest I chose to use sets 8047 and 8067. I don't own either set, so I got all the pieces that I had for both sets.

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I made a Mars rover, not modeled after any particular one.

This model features full pendular suspension, moveable satelite dish, moveable tool arm, and a panoramic camera controlled by black gear in back.

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Profile picture with tool arm folded up and satelite dish pointed down.

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Picture from the top

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And my leftover pieces

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Nifty little rover. I like it. How do you keep the upperbody horizontal? It looks like you only have a single axis to connect the wheels to, so what is preventing the body from tipping over?

BTW you were on time... just...

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I used 3 12 tooth bevel gears to keep it up right.

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It acts like a differential, with the body of the rover as the differential housing. From what I remember reading a long time ago, this is how the real rovers do it. Unfortunately, the gears allow a lot of play, the body can tip forward by almost a stud at the ends.

I tried to make it fold up, but I figure the tool arm folding would be best.

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