Recent content by jrmichler

  1. J

    Fluid dynamics with T-junction vs separate riser in tank pipe system

    We do not allow AI chatbots on the technical forums because their output cannot be trusted, and is frequently wrong. In your case, the AI is misleading you. Water flows downhill. If the water level in the Source A pipe is different from the water level in the Source B pipe, it will flow...
  2. J

    Fluid dynamics with T-junction vs separate riser in tank pipe system

    The inlet B with the riser will flow less than the inlet B with the T because of less restriction from elbows. If the supplementary inlet B is smaller than the inlet A, then it will make very little difference to the total flow. Some things you can do to improve flow: 1) Larger pipe. 2) Raise...
  3. J

    Random Photos

    We have the same smoke in Northern Wisconsin. Visibility is less than one mile. I wore an N95 mask for my morning run, which helped.
  4. J

    Random Photos

    I went for a run two days ago, of which 2.5 miles was a trail in the woods. Deer fly country. So I wore my deer fly hat with a new piece of fly paper. The hat worked well. I only whacked 5 or 6 of those miserable blood sucking varmints by hand. The deer fly population is slightly below...
  5. J

    Random Photos

    The view from down by the lake yesterday while sitting in the shade of the tree on the left. Temperature 80 deg F (27 C). I saw 14 power boats at one time, with a family of loons (two adults, one young one) swimming in the middle. An otter swam by, dove under water, and came up chewing on...
  6. J

    Random Photos

    Monarch butterfly caterpillar munching on a milkweed next to my driveway. Taken this morning with an Olympus TG-5 camera.
  7. J

    Small Hopper and Silo Design for Green Coffee

    There is more to hopper design than that. Rather than walk through the design calculations, I suggest the two sites listed below. They do a better job of communicating hopper design than anything I would write. Good search terms to learn more are dry material hopper design. Those search...
  8. J

    Random Photos

    I took this photo about two weeks ago. A pair of mallard ducks had been swimming around in front of my house. Then I started seeing only the female, and not very often. Ducks normally fly off with loud quacking when I got near, but the lone female would quietly move off a short distance. I...
  9. J

    Random Photos

    Apple tree shot out a side window of my house four days ago. This tree has given 90 to 100 lbs of apples every year for several years now. I normally get about 40 lbs, the food shelf gets about 40 lbs, and deer get about 10 lbs of apples. Cell phone camera with minor cropping. Two cherry...
  10. J

    Automotive Continuously Variable Transmission Idea

    Thread reopened because of request by person who wants to make a post relevant to the original post.
  11. J

    Automotive Continuously Variable Transmission Idea

    This thread has fully answered the OP's original question, then circled around until all sight of the OP was lost. Thanks to all who contributed. Thread closed.
  12. J

    Automotive Continuously Variable Transmission Idea

    Thread reopened. I made a simple schematic sketch of what I think that mechanism is. Shaft 1 is geared to shaft 2. Shaft 3 is geared to shaft 4. Shaft 1 is connected to shaft 3 through a differential. Shaft 2 is connected to shaft 4 through a differential. Turning shaft 1 turns shaft 2...
  13. J

    Torque to turn a large Beam on a Rotisserie

    BTDT, so I'm speaking from experience. You need a sufficient safety factor in the torque calculation. I suggest calculating torque based on 35 mm eccentricity between CG and center of rotation. With a safety factor that large, and your selection of bearings, you can ignore bearing friction...
  14. J

    Why no heatpump/refrigerator combos?

    From my electric bill for December 2025. July was high because of air conditioner and dehumidifier. December and January are high because of furnace blowers. Electric dryer is used year around. Computers are turned off when not in use. All lights are LED. The house was designed to be...
  15. J

    Why no heatpump/refrigerator combos?

    Refrigerator bought new in 2002: 39 Kwh/month. Newer refrigerator bought 2011: 35.8 Kwh/month. Data is from a Kill-A-Watt power monitor. Our total electric power consumption is 250 to 300 Kwh per month.