Hi CD,
So were thinking about doing a 2 wheel shooter hood like this.
It is powered by 2 fisher price motors (FP 9015) in a Cim-Sim gearbox.
There is a half inch ball compression.
We can shoot at a distance of 20 feet right now.
We made a very consistent prototype that shot 13 out of 16 shots from the key. Yeah for consistency!!!
We are worried about distance as we are hoping to be able to shoot from past the bump.
So I was wondering what could we do to increase our distance?
We were hoping to get around 25-30 feet.
Do we want more compression or less compression then a half a inch?
Would 1 wheel have more distance than 2 wheels?
Sorry, I forgot to take a picture I can probably post one tomorrow.
I’ve linked the thread to the shooter team mentor. He should be able to give you details on what we have found and what we are planning with our shooter. The one in the video is our shooter from 2009 with a couple of modifications.
To find the answers you seek, you need to do some experimentation. Vary the ball compression on your prototype and see what happens. Vary the speed of your wheel and see what happens. Use the data gathered in your testing in your final design.
We were talking about this. Would it be better to make sure the ball doesn’t slip by changing the wheels to rougher and having the back plate rougher or changing the compression?
Here is a photo of our prototype. Looks a little messy but it works fairly well…
We tested with a CIM motor but we are using a Cim-Sim in actuality.
Thats a solid working model for testing. Take some material and add it to the inside of the hood to increase the compression, many teams have found success with ~1.5" of compression.
Another option you guys have is to change the ratio between the CIM and the shooter axle.
Testing is really the only way to see how your setup works. Have fun and remember to watch for damage to the balls.