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(Updated!) "jumping" "jetpack" mini, do not know what to call it, too cool to be true :P

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By fritsl
2008-11-19 19:35
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UPDATE: WooT! Found the full paper on the project, man this thing is complicated :) See atachment, print it to have something to read those cold winter nights ;)

Heck, I just want to know what the pump and the valve are / where I can get them :) 

 

Embedded video: 
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By Vansu @ Wed, 2008-11-19 19:40
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that's sweet!

that's sweet!

By CaptainTuna @ Wed, 2008-11-19 20:38
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Nice one! I think he's

Nice one! I think he's "charging" up the bottles with some sort of gas and releasing it to jump, maybe with a solenoid valve?
By rik @ Wed, 2008-11-19 21:15
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 From New Scientist:Powered

 From New Scientist:

26666401.jpg

Powered by compressed air stored in two 2-litre plastic bottles, the ram - an aluminium cylinder - is fired to launch the robot to the required height.

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By OddBot @ Wed, 2008-11-19 21:46
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If you wanted to make one

I remember a magazine artical where a robot stored compressed air in a softdrink bottle like this. A piece of silicon rubber tube that was kinked by a servo worked as a valve and the pneumatic ram was made from a modified lightweight bicycle pump. Try and use a bike pump with a narrow diameter as it will push out quicker.
By BaseOverApex @ Wed, 2008-11-19 21:47
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Air Valves

PET_bottles.jpgOKay, I have a car tyre valve glued to the side of a 2L PET bottle, and an outlet at the cap. It's hooked in parallel with another one with an inlet and an outlet. Loads of plastic hose. I can pump it to 7 bar pressure with a car tyre pump. Currently holding well at that pressure. Too scared to put more.

Yes, of course I filled one of the bottles with water to see how far it would scoosh! It scooshes FAR! I think we have next summer's water pistol sorted out!

Seriously: Can anyone find a valve which can be actuated rapidly enough for this robot to be workable?? I can only find really slow ones for really low pressures.

I LOVE the idea of the spring suspension built into the wheels. THAT has to be applicable to any robot.

By OddBot @ Thu, 2008-11-20 02:42
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Valve

As I mentioned, soft silicone rubber tube that is kinked by a servo or another/faster motor. This is the simplest homemade butterfly valve I know of.

Air_Valve.jpg

Even though I haven't drawn it very well, the silicon tube should be pinched closed in two places in the bottom diagram ensuring no leaks.

By Mr Clean @ Thu, 2008-11-20 03:42
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Nifty, thanks for sharing

Nifty, thanks for sharing that.
By OddBot @ Thu, 2008-11-20 05:15
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electronic valve

This is an airvalve driven by a solenoid but it may be too small/expensive.
By Fer_ @ Thu, 2008-11-20 10:16
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Explosive airvalve

Came across this a while back, havent built it myself, but might be worth a shot? (excuse the pun)

http://www.instructables.com/id/Airgun-with-eXplosive-air-Release-Valve/

By Mr Clean @ Thu, 2008-11-20 00:09
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So cool!

So cool!
By Chris the Carpenter @ Thu, 2008-11-20 00:12
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Bimba, folks!!!!!

C'mon, you guys should know this...

Bimba is the guru of pnumatic stuff!

http://www.bimba.com/

By fritsl @ Thu, 2008-11-20 08:32
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All wicked cool info.. But

All wicked cool info.. But where are the pumps? (and I am not talking about high heels)

How on earth does one get that high pressure that fast, with such light weight?

By fritsl @ Thu, 2008-11-20 08:38
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Hey.. Just realized; That

Hey.. Just realized; That robot may not be able to pump itself!! It may just be releasing the air stored on beforehand.

If that's so, it kinda sucks! 

By OddBot @ Thu, 2008-11-20 09:55
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pumps

I'm certain the one in the video was releasing stored air but if you want selfpumping, those cheap air pumps that you plug into your cars cigarette lighter to pump up a tyre would be ideal although the weight of the battery needed would be a major handicap

 

By robologist @ Thu, 2008-11-20 20:10
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Another that can recharge?

Here's a spring version, operates a little differently, but seems to self power more. (Wait for second robot description)

http://www.youtube.com/watch?v=9kck9DNlITM

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