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#16
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Re: Kinda stupid question...
Quote:
![]() Last edited by Ian Curtis : 20-02-2010 at 23:45. |
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#17
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Re: Kinda stupid question...
we change all of our colons in our codes to semicolons and use size 8 font to conserve weight... we lost a good 20 lbs with the font change alone
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#18
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Re: Kinda stupid question...
Well, that works when I use floppies!
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#19
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Re: Kinda stupid question...
helium is inert, not only is it not flammable, it isn't at all reactive (with a few possible exceptions, of course). If its in the last row of the periodic table, it won't burn.
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#20
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Re: Kinda stupid question...
Quote:
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#21
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Re: Kinda stupid question...
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Since a 0 in electronics terms is a hole. ![]() |
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#22
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Re: Kinda stupid question...
I really like how this thread, while "silly" / "not serious", involves students taking wild ideas and doing calculations to figure out how or why they're unfeasible. Applying what you've learned to challenge even the most sensible conventional wisdom is something great to get used to doing. I wish I did it more often.
You never know when you'll run the math for something you're convinced you'll never work. Just a few days ago, the team was convinced that the tension needed in a piece of string would not be generated by a window motor powered winch, since it was so hard for a human to do. If any of us ran the numbers to challenge rather obvious seeming conventional wisdom, we'd have known a week ago what we know now. How much weight is needed to make a chassis airtight? Weatherproofing Lexan shields, and making a hinged weatherproof door should get you close enough, assuming the design was within the rules (it isn't). |
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#23
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Re: Kinda stupid question...
If you really want to use a fluid density change to make your robot lighter... just remove the fluid.
You need to pull a vacuum.... that would eliminate all of the air... Unfortunately... do beef up your robot to do this would put it overweight ... by a HUGE amount... As an aside... I wonder if all of our equipment would work in a vacuum? I know that some interesting things would happen to all of the pneumatics... ![]() |
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#24
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Re: Kinda stupid question...
doodling during the kickoff webcast back in January....Steve reminded me that I took a picture of this
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#25
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Re: Kinda stupid question...
Popular myth about the famous accident associates hydrogen with the disaster. All that flame you see is from OTHER things burning. A spark inside a pure hydrogen vessel will not ignite anything. If the gas leaked out, it would escape the area by being pushed aside by in-rushing heavier gas (air) so the igniting spark would have to be very close to the leak to cause problems. Is there a Mythbusters episode about this?
BTW, German engineers knew full well of the flammability dangers of hydrogen but were prevented from using helium by a U.S. embargo that prevented selling the safer gas to Germany. |
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#26
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Re: Kinda stupid question...
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Using it to loose weight on a robot is just silly. |
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#27
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Re: Kinda stupid question...
Quote:
What they figured out with several models was that neither the cover nor the hydrogen was fully responsible. Both of them were culprits. Hydrogen made the cover burn better; the cover makes the hydrogen burn better. Last edited by EricH : 25-02-2010 at 12:29. |
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#28
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Re: Kinda stupid question...
not to mention, that when it burns, it creates water that'll short out your robot
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#29
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Re: Kinda stupid question...
but won't the water put the fire out?
/sarcasm |
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