Warped Discs

[DonRotolo]

Originally Posted by ehfeinberg

Because the discs for Ultimate Assault are 180 grams, not 175, like a normal regulation disc, you can't just go to the store and buy any old disc. (Although the 5 gram difference doesn't seem like much, there is a considerable difference in how the two discs fly).

Can you elaborate on your experience in the flight differences between a 175 disk and a 180 disk? Are they different sizes as well?

Also:

2.2.10 The DISCS
The DISCS are Wham-O part number 53214 (custom colored Red, White, or Blue) and have a diameter of 10 5/8 in., a height of 1 1/4 in., and a weight of 180 ± 5 grams

(emphasis mine) So these could weigh as little as 175 g

[slijin]

Originally Posted by DonRotolo

Can you elaborate on your experience in the flight differences between a 175 disk and a 180 disk? Are they different sizes as well?

Alsoemphasis mine) So these could weigh as little as 175 g

I tossed one in school today, but didn't notice much of a difference - take that with a big grain of salt though.

There are a number of differences between the FIRST disc and a regulation Ultimate disc. Regulation discs are 10.75" wide, 1" thick, and as pointed out, 175g - which, obviously, is also a nominal figure. The more noticeable difference, however, is that the FIRST discs are made of a much more brittle and "hard" plastic, so to speak, and seem to have been produced with a different mass distribution (denser around the rim than the center, as opposed to the regulation disc).

[knuckleduster]

I took out the good ol' scale today and weighed my KoP disks and got anywhere from 176-178 grams depending on the disk (comes with 4 btw). When I weighed a disk I had on hand i got 176g and it is almost the exact dimensions of the other disk. The only bad news is that it was from a set of misprints and will probably never have any other duplicates handy.

[slijin]

Also, on second thought - I don't see these Whammos warping, I see them snapping in half and a million splinters. The plastic feels rather brittle.

[ehfeinberg]

Originally Posted by slijin

Also, on second thought - I don't see these Whammos warping, I see them snapping in half and a million splinters. The plastic feels rather brittle.

I will gladly test that by chucking the Frisbee's at a wall. Should be fun

[lorem3k]

Originally Posted by DonRotolo

Also: (emphasis mine) So these could weigh as little as 175 g

Weight specifications for any particular regulation disc could conceivably allow for variations (for example, a disc rated 175g ± 5g) that would place it outside of the FRC spec.

[CalTran]

2.2.11 The DISCS
The DISCS are Wham-O part number 53214 (custom colored Red, White, or Blue) and have a diameter of 10 5/8 in., a height of 1 1/4in., and a weight of 180 +-5 grams.

Rules say that it'll be anywhere between 175 and 185g. 176-178 seems right on par with what FIRST has specified.