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#16
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Re: 2073 Pneumatic Catapult
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#17
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Re: 2073 Pneumatic Catapult
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The blue line represents the launcher, the brown block represents the stops in the loaded position. The black circles are the pivot points. In the loaded position (as shown), the launcher is being pressed against the stops. An upward force at the green arrow will move pivot2 above the line connecting pivot1 and pivot3, and the rest, as you said, is history. |
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#18
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Re: 2073 Pneumatic Catapult
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#19
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Re: 2073 Pneumatic Catapult
How are you reloading this? Once the cylinders are retracted don't they need to be forced into a locked position again?
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#20
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Re: 2073 Pneumatic Catapult
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Just guessing here. |
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#21
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Re: 2073 Pneumatic Catapult
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Sorry, it just seemed like the right answer at the moment. Because of the mechanical mounting offset provided by the mounting hardware, and the wonderful force of gravity, the arms cause the system to fall below TDC when the system is retracted and then recharged. This causes the system to be locked once again, waiting to be fired. EDIT: Ether beat me to it. |
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#22
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Re: 2073 Pneumatic Catapult
Clever. Our pneumatapult failed quite well this evening. I'll have to try this when we meet on Thursday!
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#23
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Re: 2073 Pneumatic Catapult
ours is ALMOST there. We have a range of 4-13ft mostly... at 9-10 ft, our shot is just a tad too high. We need to flatten out the trajectory just a bit and we have it set.
I tried the collector and I didn't notice a difference. Then I read the thread and saw we needed one on each side of the piston. We will try that Thursday. |
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#24
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Re: 2073 Pneumatic Catapult
Mr. Bill, am I correct, then, in deducing that you have to recharge the cylinder and the accumulator entirely after every shot?
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#25
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Re: 2073 Pneumatic Catapult
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Honestly, the cycle time between shots may be a bit long. Although, if our estimation is correct, the amount of time between shots in this game "should" be enough to recharge. Although, you could add a large high pressure storage volume to help compensate for that, too. |
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#26
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Re: 2073 Pneumatic Catapult
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#27
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Re: 2073 Pneumatic Catapult
The thing that I worry about with piston launching is that shots may become unreliable with varying air pressure and the possible need for tanks to hold enough air for multiple fires. What benefit is there of this method versus piston to pull catapult to fire position and surgical tubing acting as the force that throws?
Last edited by Justin Shelley : 14-01-2014 at 22:54. Reason: grammer |
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#28
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Re: 2073 Pneumatic Catapult
Nice! Glad to see one of our favorite teams doing well! I do worry about losing too much air pressure, but realistically the majority of this game isn't even launching the ball.
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#29
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Re: 2073 Pneumatic Catapult
Will you be able to vary the distance of your shot? We prototyped something similar but ultimately decided against it due to the lack of variability.
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#30
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Re: 2073 Pneumatic Catapult
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