Chief Delphi - Bumper Material

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Re: Bumper Material

Quote:

Originally Posted by Daniel_LaFleur (Post 1409058)

Just out of curiosity, has anyone found a high CoF, tear resistant cloth that a dedicated defensive robot could use? (basically the flip side of what Dr. Joe is asking)

P.S. I hate you. ;-) Just kidding. Bring it on...

Re: Bumper Material

Quote:

Originally Posted by FrankJ (Post 1404605)

Congratulations, you just figured out the game hint. 2015 will be Arial assist without bumpers & unlimited CIMs on the drive train. The name will be "Rockem Sockem"

Or maybe it will be Aerial Assist with mandatory football-shaped frame perimeter

()

and ultra slippery bumpers. The name will be "Greased Pig".

Re: Bumper Material

Quote:

Originally Posted by Daniel_LaFleur (Post 1409058)

Just out of curiosity, has anyone found a high CoF, tear resistant cloth that a dedicated defensive robot could use? (basically the flip side of what Dr. Joe is asking)

I believe 67 had a really sticky bumper to start out in 2014 (someone mentioned they were pleather), but ended up having difficulties moving when pinned against the sides.

Re: Bumper Material

Quote:

Originally Posted by Daniel_LaFleur (Post 1409058)

Just out of curiosity, has anyone found a high CoF, tear resistant cloth that a dedicated defensive robot could use? (basically the flip side of what Dr. Joe is asking)

It was discussed slightly in this thread. I agree with Nate that the best option would be a coated nylon fabric. I have seen vinyl, polyurethane, silicone, and neoprene coated nylon. However, many of these are created for waterproofing and not strength. While quite thin at 1.9 oz., the silicone impregnated nylon looks promising. I might order a sample to do some testing.

Re: Bumper Material

Quote:

Originally Posted by Mike Marandola (Post 1409067)

Looks like that is a 70 Denier fabric. The Cordura commonly used in FIRST is likely at 1000 Denier, so it is 10X heaver thread (~3X thicker fabric). Based on that (and the description/recommended uses), I bet that the 70D will get torn apart.

Re: Bumper Material

Quote:

Originally Posted by Travis Schuh (Post 1409126)

It most likely will. I have only been able to find 1000D nylon with a polyurethane coating.

Re: Bumper Material

Quote:

Originally Posted by kevincrispie (Post 1382051)

In terms of whether teams should just use the recommended material because that is what is recommended, I would respectfully disagree. Arguably, the recommended bumper material follows the rules less than these other materials.

How can it follow the rule less than other materials if it is in the rule?
The 1000D Cordura is recommended because we know it is durable and won't easily tear. It has nothing to do with dictating robot to robot interactions for some desirable effect. The parts of the bumper system were chosen for one reason and that is to prevent robots from being beaten on to the point where they can't play. The system was derived from testing robots running full speed into immovable objects with no frame damage. The materials were chosen to be easily obtained by most teams and to not break the bank for purchase. If you choose to use more than one bumper system, all of them need to be inspected, weighed and recorded. Have fun everyone.

Re: Bumper Material

We at Robopromo have every kind of bumper material you could want or need - from offensive to defensive to everything in between. We've got pre-sewn corner bumpers, pre-sewn reversible bumpers (in offensive and standard), and a variety of other kits and fabrics. Check us out at robopromo.com.