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  1. Whoa, I've never seen that one before. That's really cool.
  2. That was some pretty sweet footage of stage separation, SES and boostback burn. That's a nice perk of RTLS! I noticed that the entry burn has a pretty high TWR--my rough timing-it-with-a-stopwatch estimate is something like 30m/s^2 deceleration, which means its actual TWR is about 4. I suppose that shouldn't be a surprise, since the thing is almost empty at that point, and you want to minimize gravity losses, but still...
  3. What would be the purpose of tweaking the position/orientation of the root part, if it takes the whole vessel with it? I'm struggling to understand the utility of it.
  4. Is that the first time a F9 booster has been used 11 times?
  5. Hi! I sincerely apologize for this taking me so long--I finally got a chance to look at your 27 circle entry craft, and from what I can see, I don't have any issues with the craft. Sure, the tail surfaces aren't quite touching the fairing, but they're close enough and meet the spirit of the challenge.
  6. Whoa, I'm getting even further behind. Mods which are informational or aesthetic are fine, as long as they don't affect physics or gameplay.
  7. Would that go along with Gurherren? (for those who don't know any German, herren = men, damen = women)
  8. What's wrong with the idea of catching a bellyflopping Starship in a gigantic net? What is its terminal velocity with empty tanks?
  9. *Some* things inside a rocket engine are designed to handle high-heat stuff. And most of the hot stuff is on the inside. There's plenty of stuff outside the combustion chamber and bell that don't react too well to super high temperatures. Recall during some of the earlier SS hops, there were things catching fire under the skirt, from residual fuel burning after an engine shuts down, or turbulent airflow sucking burning stuff back up.
  10. Can someone run through the math of this for me? That's a humongous difference in payload to orbit. I understand that disposable SS would not need heat shield tiles, fins of any sort, or fuel for deorbit and landing, plus fuel to get those things to orbit. Does all that add up to 100 tons worth of savings?
  11. There's a joke that goes something like "at that kind of altitude, you wave at each air molecule as it passes by." The air is so thin that you need larger aerodynamic surfaces in order to maintain stability. At 50,000 feet, you have roughly 1/7 the air density you have at sea level. At 80,000 feet, you've got less than 1/20th as much air hitting your flying surfaces.
  12. Reading through the Wikipedia article on it, yeah, it has a LOT of lifting surface, both horizontal and vertical.
  13. The "shuttle" is usually supported by a separate rail, so that the screw sees no radial load, only axial.
  14. I love the fact that Dragon has red and green navigation lights, just like an airplane.
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