Originally Posted by asid61 (Post 1548394)

I'm not sure how well wheels would interact with the shirts. One would have to make sure that the shirt doesn't get torn up or unroll while shooting.
What if you used a can of some sort to hold the t-shirt in while going through the wheels, but gets hardstopped before it can leave the cannon? That way the t-shirt gets acceleration but the shirts are not damaged.
Love the use of 2 stages btw, that seems like it would be useful to get longer distances.

Originally Posted by Jon Stratis (Post 1548395)

Have you done any tests with using a wheeled shooter to propel shirts? I'm wondering how much grip you would get, if the wheels would mark up the shirt from slipping, etc.

Originally Posted by asid61 (Post 1548394)

I'm not sure how well wheels would interact with the shirts. One would have to make sure that the shirt doesn't get torn up or unroll while shooting.

Originally Posted by bEdhEd (Post 1548416)

I wonder how tight of a roll the shirt needs to get any meaningful compression from the wheels?

Originally Posted by swaxman12345 (Post 1548387)

Do you think you could upload the CAD model? I'd like to take a closer look if possible.

Originally Posted by NWChen (Post 1548524)

Team 1058 approached the idea several years ago fairly successfully.

In testing, a very tight roll is not even necessary to eject a properly ranger-rolled shirt. When the forces on the shirt are perpendicular to the direction of the roll, it seems to be difficult to unravel even by hand.



The shirt compresses to about 2/3 of its normal diameter for an effective shot (independently tested with the first shooter stage and second shooter stage, but not together). The wheels do not mark up, although a few cloth fibers sometimes gather after several shots.

To clarify, I've already built this device. There's a bit more wiring to do before it's ready to test in its entirety. Indexing with the ratchet and pawl is functional. The total price of the unit is approximately $350.

Originally Posted by BetaHelix (Post 1548811)

Have you tried using mini-cims rather than full CIMs? It would be slightly smaller and the wheels would spin faster.

Also do you know if this would work belt fed or with saboted shirts? (Just hypothetically. :D)

Originally Posted by Brandon Zalinsky (Post 1549020)

That t-shirt launcher was a cool little mechanism- the indexing system you designed reminds me of ours, except you used motors and servos instead of pneumatics, which increases simplicity and eliminates the need for two separate power systems.

Originally Posted by asid61 (Post 1548700)

That's awesome then! Do you have any videos of it shooting?

Originally Posted by JoshWilson (Post 1549036)

Nice job, I especially like how you're able to do it with the wheels, and have that work well. Hope you'll post a video and let us see it in action!