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Cake day: June 11th, 2023

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  • I don’t know why everybody focuses so much on the top of the wing. Relative to ambient air, the pressure above the wing is slightly reduced, but the pressure below the wing is massively increased. That massive increase is far more important than the slight reduction above.

    We know this, because simple, flat airfoils are capable of flight. Think: paper airplanes, simple balsa models, etc.

    The shape of the airfoil is not actually very important for lift. You can make a brick produce plenty enough lift to maintain its altitude, if you can provide sufficient thrust and control it’s attitude.

    The specific shape of the airfoil is primarily important for minimizing drag across a variety of speeds and angles of attack at various loadings. This is where the top surface of the wing becomes important. By maintaining the flow over the wing, drag is reduced, and controllability is maintained.



  • While Intend to agree that the time needs to accommodate school schedules, it is ludicrous to base school schedules on the latest sunrise of the year, especially since that sunrise is only that late for a few weeks of the year, and for >2 of those weeks, the kids are on winter break anyway.

    Schools can adjust their schedules on much smaller increments.

    if new York stayed on -5 in winter

    New York is on UTC-5 in winter.



  • Timezones are already a step toward an arbitrary standard time for the purposes of making communication easier and not needing to change your watch just because you moved around. UTC everywhere would just be another larger step in that already established direction.

    The next step is to stop talking about “Daylight Savings Time” and “Standard Time” and phrase these as UTC offsets.

    The Eastern timezone uses UTC-5 over the winter. We use UTC-4 over the summer. In summer, if they used UTC-5, the sunrise in New York would be around 4AM. Which is way too early. New York should not be on UTC-5 in the summer. But there is no real problem with New York using UTC-4 year round.

    Detroit, on the other hand, would have sunrise after 9AM in winter if they used UTC-4. Which is absurd; they cannot use UTC-4 year round. But, there is no real problem with them using UTC-5 year round.

    The solution, then, is not to select permanent DST or Standard Time for the entire timezone. The solution is for the states (or localities) to each select which UTC offset makes sense for them, and the next time they are on that offset, they do not switch again.


  • Rivalarrival@lemmy.todaytoComic Strips@lemmy.worldBack on Standard Time
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    11 days ago

    Let’s stop using the terms “DST” and “standard time”. They really confuse the issue. The contiguous US uses UTC-4 (EDT) , UTC-5 (EST/CDT) UTC-6 (CST/MDT), UTC-7 (MST/PDT) and UTC-8 (PST) time zones. We aren’t all going to be using the same UTC offset for permanent time. We are all going to be adopting the UTC offset that makes sense for our region.

    New England and Michigan are currently in the same time zone, which switches between UTC-4 and UTC-5. Year-round UTC-5 puts dawn before 4am in New York City during the summer. New England should absolutely not be on UTC-5 in the summer. They should be on UTC-4. On permanent UTC-4, New York dawns will always be between 5 and 8 AM.

    Year-round UTC-4 puts dawn at 9am in Detroit during the winter. Detroit should absolutely not be in UTC-4 in the winter. On permanent UTC-5, Detroit dawns will always be between 5 and 8 AM.

    New York should be on permanent UTC-4. Detroit should be on permanent UTC-5.




  • Rivalarrival@lemmy.todaytoComic Strips@lemmy.worldBack on Standard Time
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    11 days ago

    Drop “daylight savings time” and “standard time” monikers. Use UTC offsets, and tell us what state you are in.

    New York and Michigan are currently in the same time zone. When we go to permanent time, they should not be.

    Michigan in UTC-4 (EDT) winter would have a sunrise after 9AM. That’s fucking absurd; they should not be on UTC-4 during winter. They should be permanently on UTC-5.

    New York in UTC-5 (EST) would have a summer sunrise before 4AM. That’s fucking absurd. They should not be on UTC-5 in the summer. They should be permanently on UTC-4.

    Maine’s earliest sunset on UTC-5 will be at 3:45PM. That is criminally insane. They should permanently be on UTC-4, or maybe even UTC-3.





  • Exactly. New York would probably elect to stay permanently on UTC-4 (EDT/Atlantic Standard Time), and never switch to UTC-5 (EST) like they are now. Michigan would probably choose UTC-5 permanently, and never switch to UTC-4, like they currently do in the summer.

    Both states are in the same time zone. They probably shouldn’t be when we go to permanent time.


  • Rivalarrival@lemmy.todaytoComic Strips@lemmy.worldBack on Standard Time
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    11 days ago

    Timezones are an international standard.

    UTC offsets are an international standard. The specific UTC offset to adopt in any particular geographic area is by no means an international standard. That decision is made at a relatively low level of government.

    Or we could just stop trying to fuck with it and leave it on standard time.

    Clearly, you and I don’t want to be in the same time zone. Let’s dump the “Standard Time” and “DST” names. They are really just confusing the issue.

    Eastern Standard Time is currently UTC-5. What state are you in, and what UTC offset do you want to permanently use?

    I am in easterm Ohio, and I want to be permanently on UTC-4.

    I think Maine and much of New England would choose to be on permanent UTC-3, so sunset is never before 4PM.

    I think Michigan would probably choose permanent UTC-5, so sunrise is never after 8AM.