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nerf time! / Spud guns
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Jaemus
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Joined: 01 Apr 2009
Posts: 2674
Location: NSW


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need to get one of those high speed casios on it against a scale mythbusters style!
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<Patrician|Away> what does your robot do, sam
<bovril> it collects data about the surrounding environment, then discards it and drives into walls

Post Tue May 22, 2012 4:27 pm 
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Glen
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Joined: 16 Jun 2004
Posts: 9474
Location: Where you least expect


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Who could supply such a device Very Happy?
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www.demon50s.com - Minimoto parts
http://www.youtube.com/user/HyzerGlen - Videoooozzz

Post Tue May 22, 2012 5:39 pm 
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DumHed
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Joined: 29 Jun 2004
Posts: 1219
Location: Sydney


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I'm sure we can dig one up Smile
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The Engine Whisperer - fixer of things

Post Tue May 22, 2012 5:59 pm 
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Jaemus
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Joined: 01 Apr 2009
Posts: 2674
Location: NSW


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nice job anyway Smile i'd be keen to see a combustion one done
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<Patrician|Away> what does your robot do, sam
<bovril> it collects data about the surrounding environment, then discards it and drives into walls

Post Wed May 23, 2012 7:41 am 
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Glen
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Joined: 16 Jun 2004
Posts: 9474
Location: Where you least expect


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Ditto, would like to make a a pressurised combustion one too, but i'd never have anywhere to fire it. They sound like bombs lol.

Anyway redid the pilot valve setup tonight. It's gone from 3 seconds from opening the valve to firing to more or less instant.

This valve is identical in design to the first one i posted about. The inlet port is in between the two o-rings which keeps the piston in place due to equal pressure/force in each direction. Manually pulling the valve open slightly allows the pressure flowing in from the inlet port to slam the valve all the way open, causing the pressure in the pilot area of the main valve to drop, firing that super quick. EASY AS THAT Laughing!

Turning the piston out of the leftover delrin. Being resourceful -



Old go kart axle and the piston. I really need to remake it because the axle is hardened and machines terribly. Though i might be able to hone it out enough to work perfectly.



Inlet port



Fishmouthed tube bits ready to weld



Nearly done



Dodgy install with a threaded pipe cap. Now i know it works i'll redo it all a lot better Razz Still have to make the "pull rod"



And a test. It fires as soon as you pull the pilot open. Success! Now to hone out the body and get that working 100% and i can pump this bitch up to 100psi and test it out at my mates property next week Smile


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www.demon50s.com - Minimoto parts
http://www.youtube.com/user/HyzerGlen - Videoooozzz

Post Wed May 23, 2012 9:22 pm 
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Jaemus
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Joined: 01 Apr 2009
Posts: 2674
Location: NSW


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nice progress thar!

be sure to get videos when it gets a real test Smile
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<Patrician|Away> what does your robot do, sam
<bovril> it collects data about the surrounding environment, then discards it and drives into walls

Post Thu May 24, 2012 3:15 pm 
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