One of our sponsors had challenged us to shoot a hockey puck faster then the slapshot record. The fastest recorded slapshot is 108.9 mph. Our team has currently put the project on hold and will continue it throughout build season but thought now would be a good time to share what has been completed thus far.
The design comes from a patent we found online. By our calculations and estimating the friction, using a cim motor we could get up the puck to shoot about 112 mph.
This is really pretty awesome. Have you done any testing to see how fast the puck can go?
One minor thing about it is that the wheel won’t be contacting the puck for long so you have to make sure it grips really well. This is why many shooters in FRC look like this: https://www.youtube.com/watch?v=6o2ugqju9CY. That way you can get a lot of contact with the piece pretty easily (some teams even went 180 degrees for their shooters in 2013).
I wish our sponsors told us to make cool things.
Oh yeah, this is a project to watch. Do you have a way to test the speed in-house?
But can it do a knuckle puck?
Be careful spinning pneumatic wheels up to high speeds… generally they aren’t designed for it and misbalance can be exceedingly dangerous.
Many teams that used pneumatic wheels in 2013 for shooter wheels balanced them or modified them in another way.
I’d say just be careful in general although if I find a hockey puck lodged in the side of a tree now I know who to blame…
We haven’t done much testing yet, just small scale to test the design. Also for the wheel a possibility is to switch out the inner tube with pool noodles so we control how much it is able to compress and keep it more consistant. But these are just ideas.
That’s what we did on our shooter in 2013.
I’m sure most of you have read some of the 2015 HINT DISCUSSION thread (http://www.chiefdelphi.com/forums/showthread.php?threadid=131671) and one post in particular really goes well with this thread. I think 5030 is well ahead of all of us if this post (http://www.chiefdelphi.com/forums/showthread.php?p=1416659&highlight=confirmed#post1416659) from the game hint thread turns out to be right …
I’m not saying that a hockey game won’t happen, but nearly all of the reasoning for one so far doesn’t hold up. The only bit that I am taking seriously is the omission of the 1999 game which had a reference to “pucks”. The first suggestion of a hockey game was in reference to sticks being in the “long” box, but I can’t imagine fitting sticks in a 3" wide box.
Either way, 5030’s mechanism is really cool and I would love to see different variants. I want to know how spin could effect the trajectory.
Personally, I never heard of the “hockey sticks in the long box” part, but if it was mentioned, it’s probably not right. Nonetheless, there’s not much stopping it from really being a hockey game, even if it’s a wild guess based on nothing other than a vague hint …
Here’s hoping to it being a hockey game. We’re happy to answer any other question or take suggestions. Hopefully we can finish it on te side during build season, have something to show off for chairmans.
Here are the most current CAD models…
If there is a hockey game, I hope teams aren’t shooting the pucks at 112 mph ::safety::
That alone would probably stop a hockey game in its tracks.
We played with a puck system as well in off season. We found using a tube feed similar to what is in the renderings the pucks would tilt in the tube a get jammed. Was considering making an oscillating shaker mounted to the tube to see if that would remedy the jamming.
108.9 mph (by Zdeno Chara) is the fastest recorded slapshot in the NHL, not the world. The world record is actually 114.127 mph (with the typical caveat of differences in the two competitions and the trustworthiness of the KHL’s radar guns).
Well then… looks like we need to one up it to 120 mph.
Have you considered working with belts instead? I don’t see any reason not to other than worrying about not getting the center distance close enough.
We talked with grainger before ordering parts and the engineer there said it would be harder with belts because running them at such excessive speeds and rpms like we would be, meant the belt may not handle the load. With chain we knew it would be able to handle the rpm and speeds.
What sort of rpm are you guys looking at??
