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Gabriel
Gabriel
Senior Member
Last Activity: 2022-10-01, 03:58
Joined: 2008-01-18
Location: Buenos Aires - Argentina
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  • The accident is very recent, there is no result of the investigation. The pilot reported what was apparently the engine not producing enough power (as shown by it's inability to accelerate to lift-off speed in the distance it should have and then it's inability to accelerate and climb after lift off even when they were basically at sea level and below maximum weight) but according to the pilot, while now in hindsight he realizes he had a feeling that something was not good during the take-off roll, it was not strong or clear enough as to identify a slow acceleration, and all the engine instruments read normal (that is a bit hard to believe: while not impossible, there are very few ways in which the engine can have the right manifold and right RPM and not producing the useful power that it is supposed to be delivering)

    There is no V1 in single-engine planes (and neither in light twins). There is no accelerate-stop distance in the manuals. Accelerate-stop is based on the decision...
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  • GA is not immune...

    I will give some thought (engineering thought) to this 70% 50% rule. My instinct says it is not correct neither in the form stated by Dan nor in the form stated by the surviving pilot.

    https://www.youtube.com/watch?v=ZNUvC5IbybQ
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  • Gabriel
    replied to Peeing contest
    BTW, why is this in the aviation SAFETY forum?
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  • Gabriel
    replied to Peeing contest
    ... after we limited it ourselves when we abandoned you in 2015 and now we regret.

    Entitlement.
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  • While the outcome is the same, I do make a distinction between a person being distracted or silly and crossing the railroad without looking vs a person knowing that the gates are down and / or the lights are flashing and / or the bells are ringing and still deciding to cross.

    Bells and lights, and especially gates, can save most of the first ones. Nothing can save the second ones....
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  • Or lights / bells. They are almost as effective as a gate especially for a country dirt road, and for a fraction of the acquisition, installation and maintenance cost, except...

    One day the lights / bells don't work, someone crosses without looking being confident that if the lights are off then there is no train coming, and you have a helluva lawsuit (what in human factors circles is called primary-backup inversion). It is better to have more deaths for their fault (not stopping at the crossbuck) than fewer deaths for your fault.

    Interestingly, (well designed) gates are fail safe. It takes active power to keep them up. If the motor fails, there is a power outage, the chain breaks (yes I am that old) or whatever, they fall by gravity to the closed position. Lights / bells on the other hand, no power = no lights / bells even if the train is coming.


    That black-and-white mentality. Oh the humanity......
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  • "We stop at all railroad crossings", reads the sign in the back next to the "we don't turn right or red" one.

    Which makes me think... Would a stop sign work better than a crossbuck. Drivers tend to at least slow down to an almost-stop speed upon stop signs, even ones where you know that there is nobody coming because the corner has excellent visibility and you can see that well in advance to reaching the step sign. Meaning that drivers are generally (and maybe regretfully) willing to stop on a stop sign even if it just for the sake of the black-and-white procedure.
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  • I imagine there may be dirt roads - dirt roads crossings in that area, even even dirt road - paved road crossings maybe. How are those handled? (yes I understand that a 18 wheeler playing the train will not be doing 90).

    Forget about lights and gates for a second (just for a second). Was the railroad crossing marked at all with signs? Is it possible that the truck driver didn't even know that they were crossing a railroad until it was too late?

    Any toxicology reports from the autopsies of the truck driver? (who I imagine was killed in the accident)
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