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May_Walter
25-01-2009, 10:07
1. what is their wheigt is grams?
2. what is the name of the fabruc they were originally made of?

thanks a lot
May Walter, Team 3038.
MrForbes
25-01-2009, 10:13
Weight is half a pound. That's 8 ounces. 8 x 28 g/oz = 224 grams (approximately).

The fabric is Spandex (like is used for bicycle riding pants)
May_Walter
25-01-2009, 10:27
Weight is half a pound. That's 8 ounces. 8 x 28 g/oz = 224 grams (approximately).

The fabric is Spandex (like is used for bicycle riding pants)
wow that was quick, thanks a million, you really helped us!
jamie_1930
25-01-2009, 12:28
And extras can be found at Walmart, I believe. We were able to get about ten additional the day after competition. Only problem is they are about ten dollars a ball
MrForbes
25-01-2009, 12:35
If you're in Israel, it might be a long flight to the nearest Walmart
May_Walter
25-01-2009, 12:40
you got that right..
nothing is easy when located so far away.:(
OScubed
25-01-2009, 15:42
May:

the bands on the inside can be made from lexan plastic, and the padding can be either very thin foam, or just cotton batting (we used cotton - cheaper and easier to work with). Although the original balls use a plastic connector to connect the bands when you fold them, we have used two holes (drilled in the end at a diagonal from each other) so that if you overlap the ring ends you can put a pop-rivet through the holes and attach. There are several good step-by-step construction instructions on Chief Delphi, or feel free to contact Team 1511 at www.penfieldrobotics.com for help with construction tips. Since we're making over 100 of them to host a local competition we've been getting pretty good at it :)

Cheers,
NorviewsVeteran
25-01-2009, 15:53
One of the coaches massed a few of them, and they are 235g.
MrForbes
25-01-2009, 20:35
they are 235g.

Thanks for the correction!
NorviewsVeteran
25-01-2009, 20:40
No problem, he wrote it on some of them. At first I thought we had bummed some orbit balls from team 2359.:o
Ted Weisse
25-01-2009, 21:33
Here are two links that might be helpful...

HOW TO: Make Homemade Orbit Balls
http://www.chiefdelphi.com/media/papers/2187?

and

Orbit ball template
http://www.chiefdelphi.com/forums/showthread.php?t=72781&highlight=orbit+ball

You might be able to make them from these...