View Single Post
  #15   Spotlight this post!  
Unread 14-01-2014, 16:57
chrisfl chrisfl is offline
Registered User
FRC #1991 (Dragons)
Team Role: Leadership
 
Join Date: Dec 2013
Rookie Year: 2006
Location: Connecticut
Posts: 90
chrisfl is a name known to allchrisfl is a name known to allchrisfl is a name known to allchrisfl is a name known to allchrisfl is a name known to allchrisfl is a name known to all
Re: 2073 Pneumatic Catapult

Quote:
Originally Posted by billbo911 View Post
Really good question!
After trying a Bimba 178 (1.5"dia. X 10" stroke) we found we just didn't have enough height or distance out of our system. We run it at 60 psi which produces 106 Lb. of force.

So, our next thought was that the force was sufficient, but we needed more speed out of the cylinders. So, to maintain the force, we substituted in two Bimba 0910 (1 1/16"dia X 10" stroke). This yields the same 106 Lb. of force at 60 psi, and moves a lot faster.

An additional note here is that we are using low pressure storage tanks between the valve and cylinder. One per cylinder. This is done to maximize air flow to the cylinder by not restricting it as it flows through the valve.
Funny, we had almost the same setup for prototyping and we were able to get it with the one piston(1.5in bore and 10 in stroke)
Reply With Quote