Frisbee shooter?

[jhusser]

Ok I got a question for everybody. My team feels that the hardest part of this game will be designing a good, accurate shooting mechanism. I would like to know some people's ideas on developing a good shooting mechanism. So what is your teams idea for an amazing shooter?

[nathan_hui]

At Rose-Hulman Operation Catapult, one team attached a bicycle wheel to a 120V AC motor and got some pretty reliable shooting for about 100 ft using a curved wall.

We (CHS Robotics) have found no spin, and simply shoving the frisbee off a slope is reliable for about 5-10 ft, with mediocre altitude gain. Also happens to be orientation-independent. But we plan to look at the wheel too, just to see if that's as reliable as we hope it to be.

[jhusser]

At first we wanted to use a dump system like what was used in lunacy. The issue is the height restriction which is about 84'. We went and bought a disk shooting nerd gun and took it apart to analyze it. We found the it uses a slingshot type of mechanism with an unmotorized motor to provide spin to keep it flying straight. The main issue to trying to create a practical version of that.

[Jim Wilks]

Originally Posted by jhusser

unmotorized motor

What does that mean?

[jhusser]

Sorry I meant an unmotorized wheel. Basically an idler with more grip.

[Anupam Goli]

Right now i have two types of robots in mind for the game. Look at 118 from 2012 and 548 from 2012. Both robots would have flywheel type shooters (mainly looking at 1 wheel with a curved path), but the way they score is completely different. 548 from 2012 had the system that went up to the full 84" and could simply propel basketballs into the goal. Apply this system in Ultimate Ascent, and we have a nice shooter that doesn't need as much accuracy as it needs speed in firing. The 118 style robot could shoot from far distances, but the accuracy needs to be pin point. I'm waiting until prototyping to come to a conclusion on this, but my guess is that unless the flywheel is running at the desired speed when you shoot, you won't be very accurate. Unlike basketballs, frisbees have irregular behaviour at different speeds.

[JCharlton]

Originally Posted by jhusser

We went and bought a disk shooting nerd gun

Where can I get one of those?

[elsenor]

Originally Posted by JCharlton

Where can I get one of those?

Did you guys use your own money to buy the gun or use money in your school account?

[jhusser]

Originally Posted by elsenor

Did you guys use your own money to buy the gun or use money in your school account?

It was our money. It only cost about 7 or 8 dollars

[Lemonilla]

One of my friends just found this video, which looks like it may work.

[DrakusDarkus]

Maybe use a slingshot type mechanism, or maybe two wheels spinning in opposite directions with variable speeds to shoot different distances? There are more possibilities but those are all I can think of right now

[davidthefat]

Originally Posted by JCharlton

Where can I get one of those?

http://www.amazon.com/Nerf-32218-Vor...pd_sim_sbs_t_1


It uses the exact same principle that I predict most teams will use.

[4057programmer]

I had another idea for a shooter. It would apply the same principle as the singular motor and a curved launcher, but instead of firing directly sideways to keep it stable in the air; fire it vertically. I imagine that for short distances it would retain a substantial amount of accuracy. But in planning to play as a feeder for the rest of the team a Frisbee that hits the edge and rolls along the map would be a better way to transport them than trying to shoot them and let them glide back to earth. Am I wrong in this thinking?

[Lemonilla]

Originally Posted by 4057programmer

I had another idea for a shooter. It would apply the same principle as the singular motor and a curved launcher, but instead of firing directly sideways to keep it stable in the air; fire it vertically. I imagine that for short distances it would retain a substantial amount of accuracy. But in planning to play as a feeder for the rest of the team a Frisbee that hits the edge and rolls along the map would be a better way to transport them than trying to shoot them and let them glide back to earth. Am I wrong in this thinking?

That is a very interesting concept, I think that a top spin (the bottom of the vertical Frisbee is spinning backward) would allow for a faster (and maybe further) roll.

[pruo95]

Our team has done the same and found some success