RE: Copy the Tyco "terrain Twister" screw drive?

 
I remember seeing something like this made of lego a long time ago... I
believe it was made with the flex tubes. Also, there's a GBC that uses an
Arquimedian screw to lift the balls. I'm afraid I have no links to any of
this things but maybe I've helped by jogging someone else's memory.
Jonathan

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of
David Schilling
Sent: Thursday, December 07, 2006 12:48 AM
To: [email protected]
Subject: Re: Copy the Tyco "terrain Twister" screw drive?

In lugnet.org.ca.rtltoronto, Calum Tsang wrote:
> In lugnet.org.ca.rtltoronto, Rob Antonishen wrote:
>> I saw the Tyco "Terrain Twister"
>> http://www.tycorc.com/us/product.asp?category_type_id=22&id=11811&cat
>> egory_id=7819 advertised on TV and was intrigued by the drive 
>> mechanism.
>>
>> It looks like it uses two counter-rotating screws/augers to move it 
>> forward on bad surfaces like sand or snow.
[...]
>> Any thoughts on how this could be built as a robot drive base?
>>
>> I've tried using flextube but haven't been able to duplicate this in
Lego.
>
> I don't know of any pieces which would fit the shape, but then of 
> course, I'm really not as up on my piece knowledge anymore.  There 
> doesn't seem to be a "worm segment" piece other than the actual 
> regular worm piece Chris loves so much.  There are those neat Castle 
> stairpieces which are a "sweep of arc" but I don't think you could make a
giant worm out of them.
>
> How about tirehub cylinders wrapped in flextube?
>
> Calum

Well, there is this piece:
http://www.peeron.com/pics/inv/custpics/x210c01.1092552645.jpg
from this set: http://guide.lugnet.com/set/4970.

But even if you have an old Rock Raiders set sitting around (and why would
you?), you'd be wearing off all that nice chrome if you used it. Not to
mention that, if I recall correctly, it didn't have a technic axle
connector, but just a round hole for a friction (or non-friction) pin. So,
I'd call it a close piece.
It might have worked better than the flex tubing, if only it'd been made a
tiny bit differently.

--
  David Schilling

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