Thursday, September 18, 2008

Week TechVideo, 2008 #38 - Devastator Tank

This week, two nice videos from duku666, featuring his 'Devastator Tank' both in an hill landscape and forest.

Interesting solution presented on this crawler to build tracks over standard wheels with tires.


Anonymous said...

I liked the tread design, it can be improved to build bigger models. But if they are turning on the wheels/tires instead of a gear mechanism, it's really ineffective.

Anonymous said...

Agreed, under heavy loads I would imagine they would slip.

Alex Campos said...

Hmm... from the name and the colour scheme, I can imagine where the author got some inspiration... ;)

The idea for the tracks appears simple and expansible, both in length and width, albeit at a cost of requiring many parts. I'd like to try something like that some day!

It appears to suffer the same problem as my ill-fated Grabber 2: underpowered for its weight. From the videos, it seemed to struggle with the steep hill and loose terrain. Maybe replacing the M motors with their XL counterparts would help, at the cost of faster battery drain.

About the wheel-based tread sprockets: that's what I thought, too. But the biggest LEGO gear available, both iterations of turntable, has standard-sized teeth, which at this scale would probably slip anyway: that's why the new tread pieces use sprockets with much bigger teeth.

A solution would be to keep the tracks under tension (maybe that's exactly why the author included the smaller wheels on top) via some kind of suspension mechanism.

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