Recent content by Lnewqban

  1. Lnewqban

    HVAC HVAC condensate drain line is dry?

    I recommend keeping the trap full of water because a dry condensate pipe is a path to cold air to be sucked into the house due to the low pressure that is induced in the drain pan by the blower.
  2. Lnewqban

    Misc. Yarn cross-section and path length

    Could this article be helpful? https://www.mdpi.com/2073-4360/15/3/637
  3. Lnewqban

    A complex spring's structural analysis

    Welcome! I am afraid that would need to provide much more information about this problem. Is the horizontal distance between the points of application of the forces and the bolt irrelevant? Are springs a-b-c-d and Kb under similar load? Are springs a and d under any compression load?
  4. Lnewqban

    I What thermal cycle would describe the action of a candle carousel?

    You have an endless cold source (the atmosphere) for the cooling-contraction process of the exhausted hot air. The heat source does all the work of transferring thermal energy into kinetic energy onto the blades via the ascending movement of the heated-expanded air.
  5. Lnewqban

    Bernoulli vs real life experiment

    In that case, your calculated value of 88 kPa is absolute as well and below atmospheric pressure. The pump does not know or care what is the internal pressure in your loop. Its job is always to create a downstream-upstream pressure differential. The higher the volumetric flow that is desired...
  6. Lnewqban

    Bernoulli vs real life experiment

    Is the P1 value relative or absolute?
  7. Lnewqban

    Turbo vs naturally aspirated engine power band width around peak power

    It is all about breathing. A naturally aspired engine that has a healthy breathing along a wide range of rpm's is said to have a flat performance curve, and can enjoy a transmission with three or four steps only. Turbines are only efficient in certain narrow range of rpm's and delta pressures...
  8. Lnewqban

    Problem with Bernoulli calculation

    V2 can't reach ten times the value of V1 in the smallest diameter section of the Venturi because it would be way over the speed of sound. You are stepping into the field of supersonic flow, in which the theorem of Bernoulli can't be applied.
  9. Lnewqban

    Turbo vs naturally aspirated engine power band width around peak power

    The naturally aspired engine will always have a wider power band.
  10. Lnewqban

    Local pressures in turbocharger housing?

    In that case, the answer to your question is no. The local static pressure somewhere inside a turbine housing of a turbo can never be lower than atmospheric pressure.
  11. Lnewqban

    Local pressures in turbocharger housing?

    What other reason would the air located next to the intake have in order to flow into it? The intake of the compressor sucks air from the surroundings, while the vanes of the rotor increase its pressure via centrifugal effect.
  12. Lnewqban

    Cone on horizontal surface

    In what direction would the cone slip if suddenly it reaches an area of the horizontal surface having no friction?
  13. Lnewqban

    NTSB report on crash of UPS Flight 2976 (MD-11F)

    Excellent summary! It seems that the internal combustion in the tail engine was affected or suppressed by the flames coming from the wing and wing engine.
  14. Lnewqban

    B Why higher speeds need more power if backward force is the same?

    One thing is work performed by the horse, and a different one is the time in which that work is done. Less time requires greater power. Olympic games are mainly about that fact. Your feet excert the same force on the pedals of your bicycle to climb the same hill, either slowly or quickly, but it...
  15. Lnewqban

    Bending Stress and Shear Stress

    Welcome! The shear load (think of a scissor trying to cut a sheet of paper) is induced by the same total force that induces the moment (which magnitude depends on the distance between the point of application of that force and the cross-section of interest). Please, see...