Recent content by Blowgunner

  1. B

    Questions About Vaccuum/Air Force And Its Usage

    What is a "delta P"? Its not about solving some numerical problem. I'm trying to figure out a means to convert a blowgun into an airgun without using springs. What I really want to know is this: What is the relation of the area of the vacuum tube with its length? i.e. will a long but narrow...
  2. B

    Questions About Vaccuum/Air Force And Its Usage

    The question is not about the pressure caused by a hydraulic cylinder. Its about the force of the vacuum (or rather the air in fact). When you fill the needle of a syringe with dust and then pull the piston back it rushes to its original position when you release it. Due to the pressure of air...
  3. B

    Questions About Vaccuum/Air Force And Its Usage

    Hello experts I have quite a number of questions about a project that is basically an airgun, but uses the force of air/vaccuum instead of a spring to blow the air. Here is a brief description of the whole model: There are two tubes, one placed in the other, such that there is some space...