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Originally Posted by dez250
The Offical FIRST field parts are:
The [pvc, colored] Tetra clovers are LDPE Plastic.
The Goal clovers [for the aluminum goals] are metal.
and while im at it:
The Vision Tetra Panels are HDPE Plastic.
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Can you quote your source? I had the same confusion about this, and I'd have to disagree with your interpretation. From
http://www2.usfirst.org/2005comp/200...s_Overview.pdf
Goal- There are eight tetrahedron goals on the full field. Four of the goals are modified with a hanging magnet at its peak. There are two methods to simulate the actual game goal. One uses the low density polyethylene (LDPE) ‘cloverleaf’ connectors provided by FIRST in your robot kits, the other uses metal ‘cloverleaf’ connectors and pipe nuts available from Innovation First, Inc.(IFI).
The IFI hardware will create a goal visually identical to the actual game goals.
This says to me that the goals are LDPE, and the metal ones are only visually identical. But in the same document:
Tetra- made from PVC pipe, end caps and molded ‘cloverleaf’ connectors.
Additional connectors can be ordered from Innovation First or fabricated from ¼ in polycarbonate (Lexan). The drawing link for the connector is “2005 FIRST Robotics Competition Game Team Field Elements Tetra Connector”.
So are they LDPE, Lexan, or Zinc Plated Steel as the drawing shows?