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Unread 14-01-2014, 01:33
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FRC #1212 (Sentinels)
Team Role: Engineer
 
Join Date: Jan 2014
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Re: 1212 pneumatic catapult prototype

Quote:
Originally Posted by Dave Otis View Post
Any advice based on your successful launch?
I didn't do the pneumatics on the prototype, I just built it with some others, so I don't know a whole lot about pneumatics but from what you said, you may need to either use more pistons or a bigger piston. Your setup actually sounds pretty similar to our initial attempt, after which we got it shooting better with a larger piston, after which we got it shooting better with multiple smaller pistons. Sorry I can't help you much on the pneumatic side of things. On the mechanical side, however, I can help a bit more. If you need more speed, you can either attach the piston closer to the pivot point or make the catapult longer. If you move the piston half the distance closer, you will get twice the speed but it will require twice the force. Another idea is to make the angle between the catapult and piston smaller. As Jeffy said, it seems that the pressure builds before it shoots like this. I made a picture for you