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Recent content by avhell

  1. avhell

    speed of object through water

    I gotta start figuring out everything I mean to say before I hit that silly post button. More or less, you can assume a constant temperature during the process I would imagine. If this is the case, the ideal gas law can be used here to provide a solution to your problem. (P1)(V1) = (P2)(V2) or...
  2. avhell

    Large scale lithotripsy

    transducer design is a huge pain. (even in literature. seems the acousticians are a secretive bunch ;) ). I just finished doing a few designs myself, but unfortunately what I did is wayy to lengthy for a post. I would recommend perhaps "Principles of Underwater Sound" by Urick...
  3. avhell

    Win XP Pro

    I had the same problem installing win xp pro and acad2000. THe problem is that acad is not made to run on xp pro. that is the bad news. the good news is that there is an easy fix. winxp has what is known as compatibility mode. when you insert your acad2k install cd, run the compatibility...
  4. avhell

    Fishing Lure Design Tips

    what exactly are you trying to determine for the design? hydrodynamic considerations? probability of fish attention? (start with a spherical fish....) lol. if there are hydro considerations, a basic fluid mech textbook should provide you with any info that you need...
  5. avhell

    Large scale lithotripsy

    I do not know if there is a set process already developed for this purpose (outside of medical uses), but I imagine that one could be made. The largest setback is the distance from the transducer, and transducer size to generate enough power to set up the complimentary waves to crush your rock...
  6. avhell

    Weatherproof bearings and housing

    By weatherproof, I am assuming you only speak of atmospheric conditions? I am not sure of what type of housing it is that you have in mind? let me know (or send drawings(ACAD)) and perhaps I may be of assistance? pdavid@oe.fau.edu
  7. avhell

    speed of object through water

    I think that I may be able to help :) Let me check to make sure that I have this right... Open bottomed volume (to allow excess air to escape through the bottom as it expands?) of some dimension, on its way back up, with no other forces on it other than the buoyancy (applied force)? If this...
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