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  1. Alistair_Heaton

    Spain and Portugal power grid collapse

    they have put 4 of these in, in estonia prior to unhooking from Russia. https://en.wikipedia.org/wiki/Synchronous_condenser They are putting more wind power in this year as well.
  2. Alistair_Heaton

    AA jet and Military helicopter collide over Potomac

    Sorry I got the jumble of letters wrong. ACARs allows us to email various people and get weather. CPDLC is the system for coms with ATC. And of course there are two different systems which don't talk to each other. But that's an international issue not domestic.
  3. Alistair_Heaton

    Spain and Portugal power grid collapse

    Is there any data logs of grid voltage and frequency? I keep hitting security blocks when I try and get to that sort of data due to location.
  4. Alistair_Heaton

    Spain and Portugal power grid collapse

    the one I am thinking of was commissioned around 2010 I think. Possibly to replace that one. Sorry to be geeky but we fly over it/to the right of it when we come into land on runways 24.
  5. Alistair_Heaton

    Spain and Portugal power grid collapse

    Barcelona has a pretty big thermal generation plant over 800MW which is linked to steel production. I bet none of the steel went off line.
  6. Alistair_Heaton

    Spain and Portugal power grid collapse

    This came up in my news feed. https://uk.yahoo.com/finance/news/britain-grid-operator-investigates-unusual-105021039.html
  7. Alistair_Heaton

    Spain and Portugal power grid collapse

    https://metro.co.uk/2025/04/29/flights-cancelled-power-outage-spain-portugal-madrid-barcelona-22991117/ Now to be honest I think strike season has started in Belgium anyway so Brussels being cancelled is pretty much normal this time of year.
  8. Alistair_Heaton

    Spain and Portugal power grid collapse

    Apparently it wasn't that bad they could still pump beer in the terminal. Immigration could function if you had a form of travel document they didn't need to link into an external server. This is from people who were subjected to both events.
  9. Alistair_Heaton

    AA jet and Military helicopter collide over Potomac

    The aircraft had right of way because it was restricted in movement and performance. And yes there is a system called ACARS but has to much latency for aerodrome. Plus also we use what we hear to other traffic for situational awareness. Another issue with mil traffic is sometimes they only...
  10. Alistair_Heaton

    Spain and Portugal power grid collapse

    On a side related issue. Barcelona airport kept on landing aircraft. The lights stayed on. London Heathrow couldn't manage that when the transformer went bang. From what I can see they had critical services backup in place, and it worked well.
  11. Alistair_Heaton

    Spain and Portugal power grid collapse

    Well round me they are saying computer sabotage by you know who. But that's likely linked to the de-sync from the Russian grid a couple of months ago. There will be political push to re synchronise again and finish the reactors in Kaliningrad
  12. Alistair_Heaton

    Thailand/Myanmar Earthquake: VIDEO Dramatic collapse of a high rise in Bankok

    I seem to remember there is something to do with buckling as well. This seems to remember is from watching a paper given by PRof Jim Rhodes on thin walled steel structures 25 years ago...
  13. Alistair_Heaton

    FIU Bridge Update - New Bridge Has Broken Ground

    who was paying for the first bridge? from what I can see this is a relatively normal bridge design and method of building.
  14. Alistair_Heaton

    Tug accident

    oh nice find. And not strange! And thanks tug for replying, it was you I was aiming at for interpretation of the thing I posted. I found it strange as well.
  15. Alistair_Heaton

    Tug accident

    https://www.marineinsight.com/case-studies/real-life-incident-tug-capsizes-with-2-fatalities/ Trying to get my head round the forces involved
  16. Alistair_Heaton

    Cable car failure in Italy.

    https://www.bbc.com/news/articles/cvgq7345yrjo Being reported, bit confusing if there was another car involved which became detached. And it looks very similar to this thread from 2021 https://www.eng-tips.com/threads/cable-car-disaster-in-italy.483442/
  17. Alistair_Heaton

    Helicopter crash Hudson River

    It may be. There are a few things with enough energy and solid connection to other bits.
  18. Alistair_Heaton

    Helicopter crash Hudson River

    That's exactly my thoughts The disk has enough energy to land it with an engine failure and autorotate. I suspect they already know the primary cause. They are in the guts of the why the primary cause existed. I very much doubt it will be an original design issue.
  19. Alistair_Heaton

    Helicopter crash Hudson River

    My thoughts are what has enough energy either kinetic or potential in a rotor drive train that when stopped or released can throw that big a mass away while snapping it's mounts?
  20. Alistair_Heaton

    Helicopter crash Hudson River

    On the turboprop engines they had a spline shear tube to disconnect the gearbox from the turbine section. It did occasionally fail for no reason. Don't have a clue how rotary do it. That just sounds a nasty company. I have had numerous arguments over the years about sightseeing setups...

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