Lnewqban's latest activity
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Lnewqban reacted to magicfrog's post in the thread Engineering Kinematic study of connected rods with
Like.
I will try to repost my solution with a higher resolution. Yes, the triangle AH, HB and BA is a rigid triangle. You can imagine it as... -
Lnewqban replied to the thread Engineering Kinematic study of connected rods.The resolution of the attached photo is too low to make it readable. Note that links AB-BH-HA form a solid triangle piece. Do you have...
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Lnewqban replied to the thread Engineering Kinematic study of connected rods.You are on the right path. I would use the concepts of moment (F x perpendicular distance) and work conservation (F x distance =...
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Lnewqban replied to the thread Engineering Kinematic study of connected rods.Have you been given any dimensions for the links and geometry?
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Lnewqban replied to the thread Can a flow created by a fan show an Edge effect when hitting a wall?.Please, see: https://en.wikipedia.org/wiki/Coandă_effect Note that the edge of the circular plate should not affect the flow much...
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Lnewqban reacted to Baluncore's post in the thread Can a flow created by a fan show an Edge effect when hitting a wall? with Like.
What is the axial separation, between the fan outlet, and the circular plate?
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Lnewqban replied to the thread Can a flow created by a fan show an Edge effect when hitting a wall?.Please, see: https://www.sciencedirect.com/topics/engineering/boundary-layer-separation The size of the straight and plain wall respect...
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Lnewqban reacted to 256bits's post in the thread Undergrad Why is water pressure increased in a plastic bag in a bucket? with Like.
The hydrostatic pressure at the clay surface will be the same whether the clay is enclosed in a bag, or free. While higher pressure...
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Lnewqban replied to the thread High School Fan is pushing in the front and sucking from the back.At the tip of each blade, there is also a reversed flow or vortex moving air and dust from downstream to upstream due to pressure...
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Lnewqban reacted to russ_watters's post in the thread High School Fan is pushing in the front and sucking from the back with Like.
Yeah, some people don't like the implication of negative pressure in the word; Absolute pressure can't be negative. But to engineers...
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Lnewqban reacted to berkeman's post in the thread High School Fan is pushing in the front and sucking from the back with Like.
Ah, got it. Well, I just checked our portable fan (which has flat blades) and indeed the dust accumulation is on the front of the fan...
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Lnewqban reacted to berkeman's post in the thread High School Fan is pushing in the front and sucking from the back with Like.
Cheaper fans use flat blades at an angle. Better fans use airfoils at an angle (like a propeller). Here is a good PF Insights article...
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Lnewqban reacted to russ_watters's post in the thread High School Fan is pushing in the front and sucking from the back with Like.
Yes, though for your typical desk or central air conditioning fan the air can be considered incompressible for calculation purposes...
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Lnewqban replied to the thread High School Fan is pushing in the front and sucking from the back.The blades of any type of fan transfer kinetic energy into the mass of gas that is surrounding them. That energy is observable as...
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Lnewqban replied to the thread Control type problem from mechanics.By accelerating its small mass (m) along the bar, the muscular force of the bug will need to induce a vertical component equal to...