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Subject: 
Rock Crawler
Newsgroups: 
lugnet.org.us.laflrc
Date: 
Fri, 22 Dec 2006 14:16:57 GMT
Viewed: 
2340 times
  

After a visit with Steve & Bryan last weekend, and being completely
disasatisfied with my prototype rock crawler, I began a whole new design.  My
inspiration... Monster trucks.  So I built a 4-wheel drive, 4-wheel steer
vehicle with 4-link suspensions both front and rear.  It is cool if I do say so
myself.  It's turning radius is about 12".  I can independantly steer both front
& rear axles.  Pictures can be found here...

http://www.brickshelf.com/cgi-bin/gallery.cgi?f=222253

Deep links

http://www.brickshelf.com/gallery/JBrost/RockCrawl/100_0562.jpg
http://www.brickshelf.com/gallery/JBrost/RockCrawl/100_0566.jpg
http://www.brickshelf.com/gallery/JBrost/RockCrawl/100_0564.jpg

Before I disassemble this, I'm posting it hoping that it might inspire others to
build their own rock crawlers.
So why am I disassembling it?  Well as soon as I powered this up and went
forward, this happened...

http://www.brickshelf.com/gallery/JBrost/RockCrawl/100_0570.jpg

That's right, snapped the u-joints in the driveshafts like they were toothpicks.
I really like the 4-link suspension, but it requires the use of u-joints in the
driveshafts, so I don't think I'll be able to keep the 4-link.  But it looks
really cool!

John

   
         
   
Subject: 
Re: Rock Crawler
Newsgroups: 
lugnet.org.us.laflrc
Date: 
Fri, 22 Dec 2006 16:11:32 GMT
Viewed: 
2943 times
  

At 09:16 AM 12/22/06, John Brost wrote:
http://www.brickshelf.com/cgi-bin/gallery.cgi?f=222253

Before I disassemble this, I'm posting it hoping that it might
inspire others to
build their own rock crawlers.
So why am I disassembling it?  Well as soon as I powered this up and went
forward, this happened...

http://www.brickshelf.com/gallery/JBrost/RockCrawl/100_0570.jpg

That's right, snapped the u-joints in the driveshafts like they were
toothpicks.
I really like the 4-link suspension, but it requires the use of
u-joints in the
driveshafts, so I don't think I'll be able to keep the 4-link.  But it looks
really cool!


As usual, very cool.   I look forward to seeing what you come up with next.

This week, I expect to get together with Bryan to work on our Gamma
Rex (3xNXT Walking robot), but on Saturday (Dec 30) we're all getting
together for Rock Crawling.  I hope.

Steve

 

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