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03/21/2025
posted in General Discussion
by HiTekRedNek
I was just reading about the substation explosion and fire at the Heathrow Airport substation. I have witnessed the result of such an incident and the...
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03/21/2025
posted in Electrical Engineering
by Anonymous Poster
What is the impact of a generator's subtransient reactance value on harmonic loads, and how should the optimal value be selected?
Given that this is...
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03/17/2025
posted in General Discussion
by HiTekRedNek
Mysterious echoes in "Magic Circle" in DC.
I think the steps function the same way an antenna does.
The shorter elements(steps) reflect the sounds o...
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03/16/2025
posted in Communications & Electronics
by Signode
Hello.
I am repairing an EVG EPS200 UV lamp driver (21.6kW, 24A) used in a printing machine. The control board is working fine (tested with a working...
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03/12/2025
posted in BioMech & BioMed
by nzur
Could you please provide any data or resources regarding the instantaneous separation of the elbow joint during pitching or external impact?
*separat...
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03/11/2025
posted in General Discussion
by HiTekRedNek
i asked about this problem previously, but a recent development has appeared.
My new Win 11 will not read anything from my old Win10 drive. It is loc...
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03/08/2025
posted in General Discussion
by HiTekRedNek
I recently started having Rosacea on my face and forehead. The dermatologist tried everything in their arsenal but no joy. It did nothing. There is no...
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03/03/2025
posted in Electrical Engineering
by eltech
Hi,
If you compare a 200KW High voltage motor to a 200KW low voltage motor, are the torque curves the same, including start up.
In the equation, Pow...
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03/03/2025
posted in Civil Engineering
by gideon
Does anyone know of attempts to reduce the temperature of concrete rail bridges? On very long concrete bridges, the difference in expansion rates betw...
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03/01/2025
posted in General Discussion
by schueydoo
Hi All,
It's been quite some time since I posted on here. Hope everyone is doing well. I have an interesting question. At least I hope some of you fi...
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03/01/2025
posted in General Discussion
by SolarEagle
What do you think about this new drilling technology..? To me this looks very promising...maybe we could combine drilling methods using existing a...
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02/25/2025
posted in General Discussion
by HiTekRedNek
I recently had to change a chuck on an old reversible drill. Normally, I put an Allen wrench in the chuck and give it a sharp blow with a hammer, it w...
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02/28/2025
posted in Challenge Questions
Delroy the cat is taking a snooze on the couch.
He dreams he is encircled by 13 mice; 12 of them brown, 1 of them white.
Delroy's owner says that he...
02/28/2025
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01/31/2025
posted in Challenge Questions
A square snow fort contains 40 children.There are 3 defensive positions along each fort wall (8 total).
They have vowed to defend their fort against...
01/31/2025
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12/31/2024
posted in Challenge Questions
The following riddle comes by Edouard Lucas, a 19th century French mathematician, who conceived other puzzles and [checks notes] died after a waiter d...
12/31/2024
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