pic: Team 4334 presents Murdock

[Steven Donow]

Originally Posted by joelg236

Our shooter uses a pneumatic piston to fire. It's two piston movements per shot. That plus our gear shifters and landing gear makes for some serious air requirements. It's our first year with pneumatics and we found ourselves facing a lot of air leaks, and having 12 tanks can sometimes fix that. It mostly came down to the piston taking a lot of air though. We almost went up to 16 tanks with a different bimba piston.

And we really wanted to be able to use an on-board or off-board compressor.

Do you have a picture of this mechanism? I'm sure you could do something with a smaller piston, eliminating the need for so many airtanks AND an onboard compressor...

[hiyou102]

Originally Posted by DevenStonow

Do you have a picture of this mechanism? I'm sure you could do something with a smaller piston, eliminating the need for so many airtanks AND an onboard compressor...

I have an image of a CAD rendering of the mechanism:


We needed something with the power to push a disk into the shooter consistently so we chose this mechanism.

[CalTran]

What size cylinders are you using for that? I can't tell from the cad, but you can't have needed much bigger than .75, maybe an inch? And for the landing gear, probably something tiny, along with passive deployment? Is the landing gear only alignment, or does it have another function?

[Undertones]

The inner bore of the pistons is .250. They were what was available locally and worked well. We opted to use the same piston for both the shooter and the landing gear for part standardization.

[Gregor]

Originally Posted by Undertones

The inner bore of the pistons is .250. They were what was available locally and worked well. We opted to use the same piston for both the shooter and the landing gear for part standardization.

Are you sure? That's tiny. It looks much bigger than that in the CAD render?

[hiyou102]

Originally Posted by Gregor

Are you sure? That's tiny. It looks much bigger than that in the CAD render?

That is probably a mistake on the part of one of our CADers.