Frisbee shooter
 

Hi everybody! Our team and i, are trying to build a new shooter, we tried with some youtube videos, but the frisbee doesnt have speed! How can we make a new shooter quickly? Our offseason event is on october 26th!
HELP!

Re: Frisbee shooter
 

What kind of shooter (Linear/half circular) do you currently have, and what type were you trying to emulate?

We are trying with the half circular, and from last season it was linear but it was not good enough. Maybe tomorrow i can post a photo of the two of them

Re: Frisbee shooter
 

Pretty much everyone with a semi-circular shooter either emulated, or ended up with something similar to 973's design. Ours was a 60 degree arc (arc radius = diameter of frisbee + radius of shooter wheel) minus a small amount to add some compression to the frisbee.

This image shows their shooter pretty well.

http://www.greybots.com/uploads/1/4/...0_orig.jpg?292

This was shown to be one of the most effective designs by the time the season had ended. I would highly recommend starting with that and changing as necessary.

So is it good to add some compression to the frisbee??
We'll try with that formula and i'll show you our shooters.
Thanks

Re: Frisbee shooter
 

For compression, my team used rough top & some squishy tape stuff.
More friction = high flying frisbees.

Re: Frisbee shooter
 

Probably most important is what resources do you have to build your shooter in 10 days with? If you could post a picture of your previous linear shooter and current shooter that would be great! What wheels do you have or have tried in the past? What gearboxes do you have sitting around your shop?

Our linear shooter was three bag motors through 1:1 versa planetaries with 2 7/8in banebots wheels. Opposite our shooter was a wall covered in wedgetop tread and compressed the discs about 1/2in. We noticed a huge difference in our shoot distance/consistency when we added more compression.

Re: Frisbee shooter
 

You need compression on the frisbee to transfer enough kinetic energy to it. Some of the 3M grip tape or other friction material will be useful on the wall. For the wheel, the BaneBot, pneumatic, and AndyMark hi-traction kit of part wheels worked well.

You can make a very effective shooter out of plywood. The hard part is indexing your discs so that you don't jam the shooter.

Re: Frisbee shooter
 

The purpose of compression is mostly to reduce slipping between the frisbee and the wheel, and the frisbee and the fence, to impart spin. Without spin, the frisbee will not travel very far. That's why most teams add some sort of friction surface to the fence. You want the frisbee to roll on the fence, not slide.

Re: Frisbee shooter
 

Here's what our team's shooter looked like:
http://i.imgur.com/cTw6mas.jpg?1
http://i.imgur.com/KRfkpUV.jpg?1
We used two mini cims and I believe we geared them down slightly. The blue thing is a piece of foam similar to pool noodle material (I think what we actually bought was a yoga mat). This material gave us compression and and the wedgetop tread on our shooter wheel provided grip. Together these allowed for minimal slipping on the frisbee. We cut an angle into the foam to prevent the frisbee from walking up the side of the channel and we added teflon tape to the plexiglass rails that the frisbee rested on in order to reduce friction as much as possible.

Re: Frisbee shooter
 

We used a linear design that got plenty of speed. We used two pneumatic wheels attached to a CIM and Mini CIM, with distance from the edges of the wheels to the other side of the track 1/2 an inch smaller than the frisbee diameter. (We cracked a piece of plywood with our shooter around 80% power).

http://www.youtube.com/watch?v=AfY-uYwHv50

Re: Frisbee shooter
 

Hi, here are some fotos of our shooter.
We have a mini CIM and a CIM connected directly to two wheels of 6" diameter; the shooter is linear so we have a space between the wall of acrylic and the wheels of about 27 cm. We try to shoot at 30 degrees then in 45, but we stell have problems geting the height (we only get like 1,70m ).
I don´t know were is the problem, maybe it could be the compression of the frisbee or the speed of the wheels (we connect both motors to the battery and I think we achieved good speed)

any help will be great

Re: Frisbee shooter
 

I have not seen many teams have much success with those wheels as shooting wheels. If you click on the link in my signature you can see how well they worked for us (not saying they can't but there certainly are better options). I would recommend these pneumatic wheels but it looks like you have a different concept in mind. So instead, I suggest using these wheels and play around with different compression and opposite wall surfaces (the goal as Ether pointed out is to get the disk to rotate).

Re: Frisbee shooter
 

If you can get the packaging to work, CIMs direct-driving the 8" pneumatic wheels in a linear or circular shooter with some compression work great.

Re: Frisbee shooter
 

If the poly carbonate you are using for the shooter is flexible it may be wasting all of the compression you have tried to make.