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Cake day: March 30th, 2024

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  • IMO there are sufficient search engines to find products in online shops, to check availability, compare prices etc.

    I see the main selling point of Amazon in the huge assortment (you can get everything in one place without shipping fees), the user ratings (although the quality massively declined during the last years) and the fast delivery. I’m boycotting them for around one year now and everytime I need to order a strange combination of things I’m getting reminded how convenient it used to be. I don’t intend to order there again, but I definitely need much longer to buy stuff now.





  • For those of you who couldn’t relate to Mach 25 etc. please find below some numbers from Wikipedia. A weapon flying with ~8km / 5mi per second is really insane to me.

    Boost phase, which can last from 3 to 5 minutes. It is shorter for a solid-fuel rocket than for a liquid-propellant rocket. Depending on the trajectory chosen, typical burnout speed is 4 km/s (2.5 mi/s), up to 7.8 km/s (4.8 mi/s). The altitude of the missile at the end of this phase is typically 150 to 400 km (93 to 249 mi).

    Midcourse phase, which lasts approx. 25 minutes, is sub-orbital spaceflight with the flightpath being a part of an ellipse with a vertical major axis. The apogee (halfway through the midcourse phase) is at an altitude of approximately 1,200 km (750 mi). The semi-major axis is between 3,186 and 6,372 km (1,980 and 3,959 mi) and the projection of the flightpath on the Earth’s surface is close to a great circle, though slightly displaced due to earth rotation during the time of flight. In this phase, the missile may release several independent warheads and penetration aids, such as metallic-coated balloons, aluminum chaff, and full-scale warhead decoys.

    Reentry/Terminal phase, which lasts two minutes starting at an altitude of 100 km; 62 mi. At the end of this phase, the missile’s payload will impact the target, with impact at a speed of up to 7 km/s (4.3 mi/s) (for early ICBMs less than 1 km/s (0.62 mi/s)); see also maneuverable reentry vehicle.

    https://en.m.wikipedia.org/wiki/Intercontinental_ballistic_missile