Recent content by bkhan10000

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    Gears: when Base circle less than the root circle/dedendum

    Well in most cases, the base circle is larger than the dedendum circle in diagrams I have seen: http://images.slideplayer.com/32/10033503/slides/slide_39.jpg Either way, what I am understanding is that it doesn't matter? Like the involute line starts from the base circle but it doesn't matter...
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    Gears: when Base circle less than the root circle/dedendum

    Thanks for the reply. Not a homework problem though. Desired pitch diameter: 68.330mm desired teeth #: 60 pressure angle: 20deg Base circle diameter = cos(phi)*pitchdiameter =64.209mm diameteral pitch = t/pitchdiameter= 0.878mm addendum = module = 1/diametral pitch = 1.139mm dedendum =...
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    Gears: when Base circle less than the root circle/dedendum

    Hey guys, Trying to design a spur gear but I am very confused as the root circle/dedendum ends up being greater than the base circle. What do I do in this case? The gear I'm trying to design has a 68.33mm pitch diameter, 60 teeth, the pressure angle a standard 20 degrees. What am I doing...
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    Can a 6M NaCl Solution Be Used as an Electrolyte for a Low-Tech Supercapacitor?

    Right, but conventional 2.3v supercapacitors are single cells rather than two in series as I understand. I don't get how that works. I also understand how this can easily be explained by adding the voltages per electrode, but even then the potential difference would be greater than 1.48v...
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    Can a 6M NaCl Solution Be Used as an Electrolyte for a Low-Tech Supercapacitor?

    I understand. Now how do make that work in a supercapacitor? If you read the instructions to build one I've provided, you have the basic design of a supercapacitor with two electrodes. According two what your picking from the wiki passage, that designed capacitor should also function at 2.3v...
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    Can a 6M NaCl Solution Be Used as an Electrolyte for a Low-Tech Supercapacitor?

    Actually I was just coming across this: http://diygadgets.co.za/diy-supercapacitor-home-made-super-battery/ Basically this is instructions to make a supercapacitor using an aqueous electrolyte and it too operates only below 1.2 volts. This bodes the question for how do commercially available...
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    Can a 6M NaCl Solution Be Used as an Electrolyte for a Low-Tech Supercapacitor?

    Regular supercapacitors use KOH as their electrolyte. That has higher conductivity than NaCl solution. For a supercapacitor, the electrolyte must be ionically conductive and not conduct the electrons from the anode to the cathode and thus maintaining charge separation. I think really my...
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    Can a 6M NaCl Solution Be Used as an Electrolyte for a Low-Tech Supercapacitor?

    Hey guys, Currently I am trying to build a low tech super capacitor based on the working the principle. Right now I am using a single beaker with two aluminium foil positive and negative electrodes with an electrolyte of 6M NaCl solution. The power source is a new-ish triple-A battery running...
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    Direct Heat Transfer Between a Liquid And a Gas

    Hey guys, I was trying to find the answer to this question but could not seem to find anything. I am trying to figure out how to calculate heat transfer rate between a liquid and a gas. Say the the liquid is water in a chamber (with no heat transfer to the walls). The gas is the residual...
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