Beware of R16 your robot design may be too big.

[EricH]

Originally Posted by wilsonmw04

The way i understand the rule is as follows and this the way i explained it to the team: If you were to place a 80" diameter coke can, with the bottom removed, over the robot, would the can sit entirely on the ground ground or would part of it sit on your robot. If it sits on the robot, then we are breaking the size rule. The thumbnail is question would only be legal if it was oriented so that it's largest length was 80" and no other part of the robot was outside of the cylinder.

You do know that the cylinder reference is a reference only, right? Yeah, it works, but the rule is 80" point to point. Easy test: Two posts, set 80" apart. Put robot between in all possible orientations that come close (e.g. arm out). If any can't fit, they need to be hard-stopped or programmed out.

[ay2b]

Originally Posted by ALIBI

EDIT: My analysis assumes that the cylinder is 80" since that is the way most of the references to R16 have been in CD, that the robot must fit inside an 80" cylinder.

Please take a look at the FIRST Q&A, especially this thread: http://forums.usfirst.org/showthread.php?t=8159

There is no "80 inch cylinder" rule. That was just an EXAMPLE of one shape that will pass.

The rule can be rephrased as this: if you were to project all points of the robot onto the ground (i.e. a horizontal plane), would there exist any two points which are more than 80 inches apart? If the answer is yes, then the robot is too big.

[ALIBI]

Originally Posted by wilsonmw04

The way i understand the rule is as follows and this the way i explained it to the team: If you were to place a 80" diameter coke can, with the bottom removed, over the robot, would the can sit entirely on the ground ground or would part of it sit on your robot. If it sits on the robot, then we are breaking the size rule. The thumbnail is question would only be legal if it was oriented so that it's largest length was 80" and no other part of the robot was outside of the cylinder.

I AM SO WRONG! The diagram a few post up really messed with my brain. Either the 80" coke can or a 160" coke can with the center on any part of the robot do the same thing. The kids have a design that fits within the 80 inches, it would just be a little bit better if they could get another couple inches. There are plenty of suggested ways to maximize the 80", I am not looking for any more in response to this post. Thank You.

EDIT: Responce to ay2B, previous post, I was posting this while you were also posting, I have been there and done that, many, many times, my head officially hurts.

[AdamHeard]

Originally Posted by ay2b

Please take a look at the FIRST Q&A, especially this thread: http://forums.usfirst.org/showthread.php?t=8159

There is no "80 inch cylinder" rule. That was just an EXAMPLE of one shape that will pass.

The rule can be rephrased as this: if you were to project all points of the robot onto the ground (i.e. a horizontal plane), would there exist any two points which are more than 80 inches apart? If the answer is yes, then the robot is too big.

This is the most clear way I have heard it stated.... Any two points more than 80" apart? if so, fail (restating that was more for my own understanding than anything).

[MrForbes]

Adam, the rule says "While in the PLAYING CONFIGURATION, the ROBOT may expand up to a maximum horizontal dimension of 80 inches"

I think that the best way to say that is just like you said it: There cannot be any two points on the robot that are more than 80" apart (in a horizontal plane)

Here is a better drawing of a robot that is illegal, even though the arm extends less than 80" from the rear bumper measured straight on (and I apologize to you ALIBI for messing with your brain!)

[ALIBI]

Originally Posted by squirrel

Adam, the rule says "While in the PLAYING CONFIGURATION, the ROBOT may expand up to a maximum horizontal dimension of 80 inches"

I think that the best way to say that is just like you said it: There cannot be any two points on the robot that are more than 80" apart (in a horizontal plane)

Here is a better drawing of a robot that is illegal, even though the arm extends less than 80" from the rear bumper measured straight on (and I apologize to you ALIBI for messing with your brain!)

I like this drawing a whole lot better. Aside from design changes, there just does not appear to to be any way to make 80 inches any longer than 80 inches. Did I just say that? What if we measured with nautical miles, oops, that would make it worse.

EDIT: Thank you Squirrel, but it was probably more my doing than yours..

[GaryVoshol]

See Q&A: http://forums.usfirst.org/showthread.php?t=8181

A robot that is physically capable of extending past 80" but does not do so during a match will not be penalized.

[vivek16]

Originally Posted by Kat Kononov

So, bumpers do count as part of the robot in <R16>. But, consider the fact that bumpers are only about 3in thick, and that you only need 2/3 of the robot covered with bumpers. Then, if you have a 38x28 robot, you can leave the back of the robot without bumpers, and thus only gain 3in in the front, not a whole 6in.

yes but you would want to cover the back of your robot especially well since you will be getting "gently bumped" quite a bit there.

-vivek

[israel199308]

What do you mean by "If you are planning to reach over the overpass while hurdling you better either start while underneath or not reach more than 3" past it. That includes your gripper."

[MCahoon]

ALIBI stated "does not appear to to be any way to make 80 inches any longer than 80 inches."

Now if you just accelerate your robot to near the speed of light whilst measuring it in the earth's inertial frame...

[dlavery]

Originally Posted by MCahoon

ALIBI stated "does not appear to to be any way to make 80 inches any longer than 80 inches."

Now if you just accelerate your robot to near the speed of light whilst measuring it in the earth's inertial frame...

But apparently any robot that is just sitting still is now formally moving at the speed of light, so that should be pretty easy.




.

[EricH]

Originally Posted by troy27

What a what's up with the dynamite=pig????
is the pig going to explode

Oink...Oink...BOOM! The team name is Exploding Bacon. One of last year's Einstein semifinalists.

[railerobotics]

I Wonder How many teams have really missed this Rule and will FIRST inforce it?

[GaryVoshol]

Originally Posted by railerobotics

I Wonder How many teams have really missed this Rule and will FIRST inforce it?

I'm sure it will be enforced - there's a notation on the inspection sheet to indicate whether or not the robot can physically extend greater than 80".

[Billfred]

Originally Posted by railerobotics

I Wonder How many teams have really missed this Rule...

I imagine it's a non-zero number.

Originally Posted by railerobotics

and will FIRST inforce it?

Absolutely.