Recent content by ytcat

  1. Y

    Ball in pipe turbulant problem

    Hello I have a vertical pipe with floating ping pong ball in it. I have fan at the bottom that that push the ball up. The pipe parameters: D=45mm L=1.07m Ball parameters: D=40mm M=2.7g I tried to change fan speed to move the ball but becouse turbulance the ball is not steady...
  2. Y

    Building a Device with Vertical Pipe and Stepper Motor - Help Needed

    Hello. Im bilding a device. I have 1m vertical pipe with fan in the bottom and stepper motor at the top with sliding ping pong ball in it. (pipe d=45mm, ball d=40mm 2.7g) Stepper controls ping pong high in the pipe. The device is working but mehanics is not my aria at all so...
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