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-   -   pic: Team 1714's 2011 Robot (http://www.chiefdelphi.com/forums/showthread.php?t=93088)

dodar 01-03-2011 22:57

Re: pic: Team 1714's 2011 Robot
 
Acrylic is not allowed but I thought 1714 always used Polycarb.

Katie_UPS 01-03-2011 23:06

Re: pic: Team 1714's 2011 Robot
 
Invisible robot, nice. :)

pfreivald 01-03-2011 23:13

Re: pic: Team 1714's 2011 Robot
 
Okay, that's just cool.

Cool cool cool cool.

Rupnick 01-03-2011 23:59

Re: pic: Team 1714's 2011 Robot
 
Ah nevermind then. I retract my previous statement.

EricH 02-03-2011 00:14

Re: pic: Team 1714's 2011 Robot
 
Quote:

Originally Posted by dodar (Post 1033424)
Acrylic is not allowed

Incorrect. Acrylic is allowed, provided you don't go over cost and weight constraints and all those other general rules. However, using it on a robot? Not if it can be avoided; it breaks too darn easily on impact.

BTW, there's a robot in that picture? I only see a bunch of wires and other miscellaneous parts...:D

J93Wagner 02-03-2011 00:27

Re: pic: Team 1714's 2011 Robot
 
Quote:

Originally Posted by nahstobor (Post 1033348)
What's better than robotics? :-)

More Robotics of course. :)

dodar 02-03-2011 00:36

Re: pic: Team 1714's 2011 Robot
 
Quote:

Originally Posted by EricH (Post 1033486)
Incorrect. Acrylic is allowed, provided you don't go over cost and weight constraints and all those other general rules. However, using it on a robot? Not if it can be avoided; it breaks too darn easily on impact.

BTW, there's a robot in that picture? I only see a bunch of wires and other miscellaneous parts...:D

I was referring to the minibot.

Navid Shafa 02-03-2011 01:32

Re: pic: Team 1714's 2011 Robot
 
Quote:

Originally Posted by eric1010 (Post 1033269)
The weight is very close to 120 lbs

:ahh: That is so hard to believe! I am surprised that it weighs that much...

Rough stats gives the weight of unfilled polycarbonate at 0.043 pounds per cubic inch and the weight of comparative aluminum 6061 at .098 pounds per cubic inch.

I'm sure you pushed the envelope, just would really love to hear where most of that weight went :)

Nice work, Like the design!

Dr Theta 02-03-2011 09:34

Re: pic: Team 1714's 2011 Robot
 
It looks great, and I can only assume that with "continuous improvement" it will be even more beastly when I get to see it in person. I was really excited to see that you guys decided to return to Minnesota. Great team, great robots, enough said.

dbeckwith 02-03-2011 11:13

Re: pic: Team 1714's 2011 Robot
 
What robot? I don't see a robot! *squints* Ohhhhh... :D
It's nearly invisible!

Snalios 02-03-2011 15:03

Re: pic: Team 1714's 2011 Robot
 
Quote:

Originally Posted by Navid Shafa (Post 1033509)
:ahh: That is so hard to believe! I am surprised that it weighs that much...

Rough stats gives the weight of unfilled polycarbonate at 0.043 pounds per cubic inch and the weight of comparative aluminum 6061 at .098 pounds per cubic inch.

I'm sure you pushed the envelope, just would really love to hear where most of that weight went :)

Nice work, Like the design!

Its not that hard to believe, considering that lexan weights more then aluminum.

Nuttyman54 02-03-2011 15:51

Re: pic: Team 1714's 2011 Robot
 
Quote:

Originally Posted by Snalios (Post 1033714)
Its not that hard to believe, considering that lexan weights more then aluminum.

Polycarbonate (Lexan) weighs about half as much as the same size piece of aluminum. However, it is not nearly as stiff. To achieve a similar stiffness (which is necessary in things like arms, chassis, etc.) you're going to end up at around the same weight as if you did it with aluminum, maybe even a little heavier. The weight in this robot probably went towards making it stiff enough for the rigors of competition (drivetrains that flex are not fun).

AdamHeard 02-03-2011 16:01

Re: pic: Team 1714's 2011 Robot
 
Quote:

Originally Posted by Navid Shafa (Post 1033509)
:ahh: That is so hard to believe! I am surprised that it weighs that much...

Rough stats gives the weight of unfilled polycarbonate at 0.043 pounds per cubic inch and the weight of comparative aluminum 6061 at .098 pounds per cubic inch.

I'm sure you pushed the envelope, just would really love to hear where most of that weight went :)

Nice work, Like the design!

it's less dense than aluminum, but it's used in thicker (and larger pieces) usually. Most of the structural tubing on our robots is 1/16" wall thickness, occasionally 1/8". 1/2" polycarbonate is substantially heavier, while still being less dense.

Chris is me 02-03-2011 16:06

Re: pic: Team 1714's 2011 Robot
 
Quote:

Originally Posted by Snalios (Post 1033714)
Its not that hard to believe, considering that lexan weights more then aluminum.

This isn't true.

Navid Shafa 02-03-2011 20:46

Re: pic: Team 1714's 2011 Robot
 
Quote:

Originally Posted by Snalios (Post 1033714)
Its not that hard to believe, considering that lexan weights more then aluminum.

Did you not see the stats I posted? I am not saying that I have the exact wieghts per cubic inch, but I'm pretty sure that they're close...

Also, Thanks Nuttyman54 and AdamHeard. Sure it could weigh the same as aluminum if it has increased the thickness, but from the picture, I had trouble noticing any difference in thickness considering it's practically invisible :P


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