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1212 pneumatic catapult prototype
http://www.youtube.com/watch?v=YDuA0...ature=youtu.be
So we actually improved it after I took this video but I didn't record it. The metal bit in the middle is the height of the goal. |
Re: 1212 pneumatic catapult prototype
Very Nice!
Did you select that starting angle for the cylinder on purpose? It seems like a good way to get around flow restrictions without added mechanisms. It seems that is is what is happening: 1. The cylinder has a very short lever arm at the starting stage 2. Because of this, pressure must be very high for the cylinder to start moving 3. Once the arm starts moving, the cylinder gains leverage (the lever arm is longer) and moves the ball very quickly. |
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Re: 1212 pneumatic catapult prototype
Looks nice, I've wondered how the pneumatic launchers that worked in 2008 got the pressure build up needed for a quick fire without any fancy mechanisms and that video gives a good view of it.
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Re: 1212 pneumatic catapult prototype
This is really impressive. My team is also using pneumatics, but we have two with long arms. We're still trying to figure out how to decrease the length while keeping the power. Currently we have two c-channels as arms and a stainless steal rod for the basket. You guys seem to have figured out and it's awesome.
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Re: 1212 pneumatic catapult prototype
Thanks for the video and information. Any chance you could provide the spec's on the cylinder you used? Stroke, bore, etc?
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Re: 1212 pneumatic catapult prototype
I'm in awe right now that was just fanstatic keep up the good work.
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Re: 1212 pneumatic catapult prototype
Here is our pneumatiuc shooter
http://www.youtube.com/watch?v=fljCP...ature=youtu.be |
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Re: 1212 pneumatic catapult prototype
Here is our shooter: http://youtu.be/r-9v9loC2As. Right now we are trying to make it shorter, and we don't really have a way to do that. Currently the cylinders on there are bimba 1.5in's, but I'm not sure the stroke on them.
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Re: 1212 pneumatic catapult prototype
Glad to see that other teams are having success with the pneumatic catapults. Our team is doing something similar. We have a catapult made with two pieces of conduit and roughly 30 lbs of spring force on the end. We are planning to use a piston to pull it back. When we tried it today we only put air to one side and it extended too slow when releasing the pressure. Tomorrow we plan on hooking up both sides to see if we can get it to extend faster.
Without the piston we can shoot the ball about 7' high at 16' away. |
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Re: 1212 pneumatic catapult prototype
Wow, impressive, thanks for sharing. Question regarding the valve you used. We have been using a Festo VPLE18-M5H-4/2 - 1/4 with a 12" stroke, 0.75" bore BIMBA cylinder. We didn't get the launch distance we were expecting and so tried putting two of these valves in parallel, and also using 3 large pneumatic capacitors and keeping the pneumatic lines as short as possible. Any advice based on your successful launch? Thanks!
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