Hardest Shooting Robots

[Jared Russell]

5817's "bench grinder" is absolutely the hardest shooter I have ever personally witnessed on an FRC robot...ever.

[sdcantrell56]

My response to this whole thread is... WHY?

[MrTechCenter]

Originally Posted by sdcantrell56

My response to this whole thread is... WHY?

Why not?

[IronicDeadBird]

My understanding is team 2240 has an interesting shooter to say the least. I haven't seen it in action, I don't know exact details, all I know is how the boulder goes through the process of "shooting" and it is scary. It is also worth noting I haven't seen anything like it before ever.

[GreyingJay]

Originally Posted by sdcantrell56

My response to this whole thread is... WHY?

I'm guessing that a faster shot velocity would reduce the effects of drag, deformed balls, and other real-world variables from affecting your trajectory calculations?

[Electronica1]

Originally Posted by GreyingJay

I'm guessing that a faster shot velocity would reduce the effects of drag

Pretty sure it would increase the effects of drag

[sdcantrell56]

Originally Posted by GreyingJay

I'm guessing that a faster shot velocity would reduce the effects of drag, deformed balls, and other real-world variables from affecting your trajectory calculations?

I tend to think the opposite. Our testing agrees as well.

[ravenc83]

Originally Posted by Jared Russell

5817's "bench grinder" is absolutely the hardest shooter I have ever personally witnessed on an FRC robot...ever.

Based of the video physics analysis we did, the shot clocks in at 110 FPS or 75 MPH. Based off the boulder I took to the face after it ricocheted off the wall of our shop, the shot clocks in at just under "Superman sneezing in your direction".

[fox46]

My response to this whole thread is... WHY?

Basically it's about trajectory. You want the flattest one so that when aiming, your shot is less dependent on the distance to target. This means the driver doesn't have to worry about positioning of the robot and the software doesn't have to calculate a firing solution as rigorously. Furthermore, the shot is less dependent on the condition of the game pieces. In 2013's case, a linear trajectory was desired because math is hard. Take a look at video of 2013 in aerial assist- the same design philosophies were in use. On the FIRST Robotics Canada facebook page, they recently posted a ton of pictures of GTR East with a few close-ups of 2013's machine. While I can't speak too much to the development of the mechanism as I am in a purely advisory relationship with the team this year, I do know it required a number of prototypes and testing to see what the limits of compression, friction material and inertia were.

[GreyingJay]

Originally Posted by fox46

Basically it's about trajectory. You want the flattest one so that when aiming, your shot is less dependent on the distance to target. Furthermore, the shot is less dependent on the condition of the game pieces.

Aha. That's what I was trying to get at with my (counter) intuition about dealing with factors affecting ball trajectory.

[dkavanagh]

We all see videos of shooters working, but at the NYC regional, I saw a lot of missed shots. thebluealliance.com has some great stats, but nothing on shooting percentages. Anybody have any real data on percentage of made shots in high goal?