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About RedKraken

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    Sr. Spacecraft Engineer

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  1. Starwaster updated deadly reentry for 1.6 about 2 days ago : And realheat most recent commit has a dll recompile for 1.6.1 :
  2. Got the center. Got some nice telemetry for a GTO sat. awesome
  3. What sort of acceleration limits are we going see on FH today? 3g? maxq? 30kPa? Have the block 5 sea level engines raised their isp (from 282s- 311s) ? What chamber pressure are they at now? How much fuel do you think will remain in the center core after booster sep? 120t? A bit of prop gets burnt during engine startup from T-3s to T + 0s How much prop do you think is in the tanks at liftoff? 405t?
  4. I was interested in what measurements they could take from this image : The University of Amsterdam's Sera Markoff said that the size of the black hole provided a new estimate of its mass; she called it "really a monster, even by black hole standards." It's roughly the size of the Solar System, but it has a mass that is 6.5 billion times that of our Sun. This actually resolved a conflict between two other measures of its mass, one from the motion of gas clouds nearby, the other from tracking the stars orbiting it. This may help us refine estimates of mass for black holes elsewhere. from ars
  5. this is block3 -> block 5 cores right?
  6. For the faithful : Does anybody know who did the original with FH? I only rubbed out the FH to put in hopper. I know it is hard to tell its been doctored.
  7. Sweet baby raptor jesus. This thing is going to be all kinds of awesome.
  8. The internet needs transpiration cooling.
  9. RL-10 is burning now.
  10. Tom Mueller's team is rocking. I seriously hope we get a book out of that team and the test stand guys. Engineering text on modern LRE development. sans the itard stuff. Also the structures team, software, gse, payload, Lars landing algorithms are papered, but EDL would be another awesome text.
  11. This is interesting. Is this the first time EM has managed expectations for raptor ? And they are getting engineering iterations on their engines down to around 3 weeks from test to test?
  12. BFR REentry math : by sebaska "The bow shock pressure is not immense. The compression ratio is immense (hundreds to thousands times) but if you are compressing from 0.0001 bar ambient, the end result is small. Edit: Actually you can easily estimate pressure: Loaded Starship has about 200t mass. It had about 500m² surface. As hypersonic lift is predominantly caused by bottom/windward surface (contrary to subsonic, transonic and low-mid supersonic, where upper wing surface provides 80+% of the lift), so 500m² surface supports 200t mass at re-entry g-load. With 5g it means 20kN/m² i.e. 20kPa, i.e. ~0.2 sea level pressure."
  13. Yep. He has to make back at least 30 million....probably more like 60 million on the engines alone. How much is Falcon 9 to build ....50 million? What is going on? unless raptors cost about the same as elon how?
  14. 268 bar for 20ms (?).....a new high bar. Tweet storm :