Spaceflight news
- Progress loss (NSF forum) (NSF forum) (russiaspaceweb)
- New Shepard flight update (BlueOrigin.com)
- Complete reuse vs SMART reuse (NSF Forum)
- ISRO successfully test CE20 (parabolicarc.com) (YT)
- D2 pad abort (NSF)
  - Preview presentation (YT)
  - One dummy, five mass simulators (spx)
  - Scorch marks from static fire day before (YT)
  - Burn was 8 seconds short (slate.com) (@elonmusk)
  - Was there an early engine-out just before all eight were cut? (/r/spacex)
  - Wide view, no-cut video (/r/spacex)
Questions, comments, corrections
- /u/saabstory88: It's funny that you should mention that engines, fuel lines, and a thrust structure have never been used like that before. In fact, it was on the original incarnation of the Atlas that used exactly that technology. In the stage and a half configuration used by the Atlas missile, SLV series, and Atlas I and Atlas II, they dropped the whole outer booster structure, and cut the fuel lines mid flight. So this latest "Evolution" of the Atlas will actually use a staging method seen on the very first model. For reference: http://www.b14643.de/Spacerockets_2/Diverse/Atlas_MA-drive-system/index.htm
- Cost of F9 fairings (/r/spacex)
- @nerobro: “Laptop fans are not centrifugal, they're "squirrel cage" blowers. Centrifugal pumps are used for their high pressure ratios” (Nero Wolfe)
  - Article on centrifugal fans (wiki)
  - Expanding duct stator compressors (YT)
Heat Shields
Upcoming spaceflight events
- May 16: Proton-M/Briz-M carrying Mexsat-1 (Centenario).
  - Webcast: (imgondemand.com)
  - Alternate webcast: (tv-tsenki.com)
- May 20 1445 GMT: AFSPC 5
  - Webcast (YT)