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  1. TugboatEng

    Air India 787 crashes on take off

    The younger one. Pilots universally rejected the use of face masks early on during COVID any pilot that does sport them is an outlier. Face masks are a safety hazard. https://www.ifalpa.org/media/3728/22sab04-use-of-masks-in-the-cockpit.pdf
  2. TugboatEng

    Air India 787 crashes on take off

    One could argue about the actual effectiveness of mental health treatment. There is no cure for mental health issues.
  3. TugboatEng

    Things are Starting to Heat Up - Part XIV

    You're a concrete engineer... You left that out of your footprint. Everything else you listed are assumptions. Maybe you should put some effort into investigating?
  4. TugboatEng

    Things are Starting to Heat Up - Part XIV

    Dik, have you calculated your own carbon footprint?
  5. TugboatEng

    Air India 787 crashes on take off

    One of the pilots posts photos of himself with a face mask. That's not a sign of good mental health.
  6. TugboatEng

    Hot Dip or Cold Galvanized for Stud bolt in Piping

    Zinc-aluminum flake coatings outperform hot dip galvanizing and can be used on all strength classifications.
  7. TugboatEng

    Air Force Diverts Missile Funds To Modify Qatari 747... Money is being taken from Sentinel ICBM program, which is over budget.

    Have you used the term TACO outside of a conversation about food, a midsized pickup truck, or a bent bicycle frame?
  8. TugboatEng

    Air Force Diverts Missile Funds To Modify Qatari 747... Money is being taken from Sentinel ICBM program, which is over budget.

    How do security clearances feel about employees who despise their boss so much they can't even verbalize their boss's name?
  9. TugboatEng

    Explosion at fireworks storage facility in Northern California

    It's zoned as agricultural. Explosives and fertilizer have an ingredient in common, nitrogen. Maybe the explosions started in the fertilizer and not the fireworks? Remember the ammonium nitrate explosion in Beirut? Did we ever find out what initiated that explosion? If you want to get...
  10. TugboatEng

    Air India 787 crashes on take off

    Remember the Alaska Airlines pilot that was tripping on 'shrooms and tried to shut down the engines on the airplane? He said he was trying to pull the red handles. From what I can tell the pilots' fuel cutoff handles are white on the 737. That brings up the fire suppression system, everything...
  11. TugboatEng

    Air India 787 crashes on take off

    My understanding is that the APU powers the EEC until the engine is running. Once running, the VFSGs go on to the bus in parallel with the APU. If all 4 VFSGs are operational the APU is shutdown. If one VFSG is non-op the APU stays running for the duration of the flight. There is no interruption...
  12. TugboatEng

    Air India 787 crashes on take off

    The engines use FADEC. It is most likely PWM to the nozzles that determines the amount of fuel the engines receive. No power means no pulse which means no fuel. That is it. No springs or fuel cut valves required. We know there was no power because the RAT deployed. We're fighting this problem...
  13. TugboatEng

    Permeable Thin Material

    You have described a filter. Your challenge is that with the very small surface area the sorbent will clog the filter before much acetone passes through it.
  14. TugboatEng

    Sizing Generator- Florida Nursery

    Permanent magnet excitation eliminates a lot of the issues with regards to harmonics.
  15. TugboatEng

    Things are Starting to Heat Up - Part XIV

    Hey dik, have you ever calculated your own carbon footprint?
  16. TugboatEng

    Air India 787 crashes on take off

    I get that but don't you think generators that operate the FADEC would have some mention in the MEL? With that said I am looking for mention of the 235v to 28v transformers in the MEL and haven't found them yet. BUT! I don't think that's relevant because it seems the RAT deploys in failure of...
  17. TugboatEng

    Sizing Generator- Florida Nursery

    Sure, the old 2-71 Detroit Diesels are a great example of a small sized, low output, high reliability, and long lived engine. Please, share an example of a similar engine that can be purchased new today. Canada may be different. We have emissions rules in the US. A modern 4.5L engine operating...
  18. TugboatEng

    Air India 787 crashes on take off

    People are still speculating about mast bumping on the Hudson river helicopter despite us having images of the top deck of the helicopter separating from the airframe...
  19. TugboatEng

    Air India 787 crashes on take off

    It's weird but that doesn't say that the airplane has PMGs. It's explaining that the independence of the VFSGs eliminates the need for 28v PMGs.
  20. TugboatEng

    Air India 787 crashes on take off

    Multiple sources is not an indication of quality. Articles use a lot of circular referencing nowadays. Maybe it was missed but this website has the most complete description of the electrical systems on the 787. There are no PMA or PMGs...

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