Comments by "Helium Road" (@RCAvhstape) on "Scott Manley" channel.

  1. "These aren't those kind of feet." [Quentin Tarantino has left the chat]
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  2. If it was intentional you wouldn't let it trash your test stand like that.
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  3. My background is in electronics, not rocket engineering, but my understanding is that the nozzle acts as a sort of impedance matching device between the engine and the ambient environment, to ensure as much power gets delivered from the "source" to the "load", so suddenly losing the nozzle in such a short period of time probably generates a wave of some sort that the "source" isn't going to like. I'm just BS'ing here, of course, but I find that electronic and mechanical systems can often be analogs of one another. Keep in mind I don't know what I'm talking about.
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  4.  @johnsmiff9649  Crew Dragon isn't dangerous because of its design; it's dangerous because it's built by SpaceX, who think you can fly people on rockets with the same slacker hipster attitude you run an internet startup.
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  5. I took a ride in an Uber. I guess that makes me a "motorist".
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  6. Pretty darn "anime"? So it looks like it will convert to a giant mecha?
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  7. Advances in technology are useless without proper systems engineering.
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  8. As the center booster approaches the barge, over the sound of the engines could be heard "Leroy Jenkins!!!!"
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  9. MAD works. But it doesn't protect against mistakes or suicidal madmen. Problem is there's no good alternative. Need to become a multiplanet species just in case.
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  10. Looks like the sats are spinning a Tholian Web around the Earth.
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  11. You know I saw this coming as soon as I saw the title but I wasn't expecting that execution. Nice work, Mr. Manley.
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  12. Mercury's apparent position is affected by relativity due to its proximity to Sol, just a bit. This vehicle's perihelion is a lot closer to Sol so that relativistic effect will be much more important when it comes to orbital computations.
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  13. Why do the giant letters have gravitational force? These things are totally fictional, so you can make them out of whatever you want. Giant hollow Styrofoam, or tin foil, or even some kind of Star Trek holographic tech that shines light outward, also solving the facing-away-from-the-sun part.
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  14. The Vulcan is cool and all, but it will be sad to see the end of the very long Atlas program, which stretches back to the mid 50s and has had huge historical significance, starting as the first American ICBM and quickly retiring as a weapon and morphing into a very successful launch vehicle family, including launching Mercury manned spacecraft into orbit. When the last Atlas flies, we need to have a big online tribute party for it.
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  15.  @mattbrew11  Orbiting 40 satellites is easy, though. Launch any rocket with a basket of 40 baseballs, eject basket, done.
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  16. Whatever the hate for SLS, I still love that RS-25 engine, such beautiful machines. When the engine shuts down and there is ice on the outside of the nozzle while a moment before there was hell fire on the inside, that just gets me every time.
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  17. "Yeah, there's stars in there. Shut up." Scott Manley, 2022!
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  18. I love this kind of stuff. When I was little there was a TV program, some kind of documentary about the technologies used in the soon to fly Shuttle. The film of the guy holding the tile fresh out of the oven stayed in my mind to this day. So what about the metal scale system that was developed for the X-20 program? Would that work any better?
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  19.  @hoghogwild  TLDR your silly book length kook rant
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  20. We are now at the point where large clouds of space junk are being launched en masse. Astronomy will be a problem, but so will collision hazards.
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  21. Or the theme from Dragnet.
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  22. "Damn rockets, ruined Scotland."
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  23. It's only a problem if the CCP cares what happens.
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  24. If NASA had made 17 or 15 of them then there'd be at least one left for museums. Tough luck it happened to be exactly 16. BTW last I heard there is also a raft of F1 engines sitting in storage someplace, waiting for the day when someone finds a use for them.
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  25. At least Boeing quit now before wasting many more years of time and money on it. If you're in over your head, please quit now so the customer can cut their losses and move on.
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  26. Fascinating stuff Scott.
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  27. Some of these are pretty cool, but I still want my giant wheel station with a Howard Johnsons in it.
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  28. "Perilune" Technically not incorrect, but I believe NASA used the terms "pericynthion" and "apocynthion" to label the apses in a lunar orbit. Also not incorrect would be "periselene" and "aposelene". To be consistent with the usual naming system of Solar System objects, the proper name of the planet or moon is the Roman form, in this case "Luna" (the actual name of our moon, even though we get lazy and just call it "mun"), and the aspects of the body are in Greek form, "Selene" or sometimes "Cynthia". I have heard people say "lunar geologist", which is a contradiction in terms; "geo" refers to the earth (aka "Terra"). The proper name for such a person would be "selenologist". On Mars he would be an "areologist", and so on. This language and naming stuff is kind of a pet peeve for me. We want to live out there some day, we may as well learn the names. Just don't call your colony "Hadley's Hope" if you know what's good for you.
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  29. Love these technical history videos! The aeolipile's creator was Hero of Alexandria. I remember seeing that in a book somewhere growing up, with a picture of it. I would call the nozzles "jets" as opposed to "rockets", but it's all semantics I guess, since a rocket is technically a type of jet, and thrusters on spacecraft are often casually referred to as jets.
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  30. Green slime makes me think of Alanis Morrissette...
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  31. You can do zero-G by renting a Cessna 150 and nosing it over into a parabolic arc, no need for a jetliner. Of course the cabin is too small to really float around, but you'll feel it, alright. Just pretend you're in a Gemini capsule.
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  32.  @Eric-kn4yn  Pretty high tech for the early 1940s. It's a really good thing the Germans spent their money and effort on things like missiles instead of nuclear weapons.
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  33. I'm happy to see that the knowledge from the Space Shuttle program is apparently being put to good use in a private space program, which is ostensibly one of NASA's main reasons for existing. STS was the very first of its kind, and while it failed to be economical and had safety shortcomings, it achieved a number of remarkable technical feats and 3 decades of real flight data was obtained, which is now available for industry to put to good use. I hope this heat shield system works out.
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  34. There is video of the inside of a Saturn V fuel tank out there, showing those massive F1's sucking the kerosene down like a swimming pool drain from hell.
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  35. The concept of using aerodynamic forces to change an orbit plane goes back a very long way, and was considered to be used for the canceled X-20 Dynasoar program and is described in the literature from the early 60s.
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  36. I love these anomaly breakdowns. If you haven't done so yet, you should do a video on the GPS launch that blew up over the launch pad back in the 90s, showering burning solid propellant all over the employee parking lot and melting cars.
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  37. I think the APAS system also allowed for two shuttles to dock to each other, allowing for rescue scenarios.
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  38. I read about this a few years ago on The Atomic Rocket Main Page website. It's awesome and scary, as is the open cycle gas core reactor. Do NOT use these things anywhere near a planet people live on. There is a saying on that site, "Any spacecraft propulsion system powerful enough to be interesting is also a weapon of mass destruction".
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  39. Yet another installment ion the Scott Manley Bathrobe series!
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  40. 6:12 Is that the new Moonraker expansion they've been keeping secret?
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  41. Americium I pronounce as am-er-EEE-see-um
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  42. Congratulations!
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  43. When this kind of mistake happens, that guy and several others involved all get fired.
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  44.  @tatianaromonov1416  Who exploded?
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  45. These little things are the kind of thing that can kill astronauts on long missions to places like Mars. In concept, a spacecraft is such a simple vehicle; you fill a can with air and food, stick an engine and some sensors on it, man it, and launch it into space. Since the early days when Clark and Heinlein and Asimov wrote about this stuff we have learned, and keep learning, so much about the space environment and how it interacts with spacecraft equipment and crews, but we still miss things like this in designing the devices. These RWA's were tested rigorously by the vendor, under the watchful eye of NASA and other customers, and passed every test, and yet there was something going on that nobody had ever though to model. If we are going to start sending people into deep space, or even long duration missions to the Moon or near-Earth solar orbits, we need to make sure the mission can absorb the weird things nature will throw at us. These unknowns, and the risk incurred, is part of what makes spaceflight so expensive.
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  46. Cannon shells carried by aircraft are made of mildly radioactive depleted uranium. A-10, AV-8B, for example.
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  47.  @epincion  At >500 km they will last quite a bit longer than that.
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  48. If you want to pay Lockheed Martin to start building civilian aircraft again, they'll be happy to do it. So put up or shut up.
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  49. China acts like they are a forward looking modern nation, but sometimes they remind us that they are in fact a brutal communist dictatorship that tries to control all information.
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  50. Elon Musk has irritated the powers that be with his recent non-space related purchase, so of course his space operations will not be punished by the completely professional and non-politicized government agencies. I know this because the Disinformation Governance Bureau has warned me against knowing otherwise.
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