Vel tibage fra rumstationen

Det er jo en fornøjelse når ting ikke længere når nyhedsraderen fordi de simpelthen fungere så godt at det er kedeligt. Sådan er det gået med Den Internationale Rumstation og sådan ser det ud til at gå for SpaceX. Det der fungere bliver ligesom den daglige afgang med s-toget ikke anledning til tjuhed og omtale. Derfor er det heller ingen nyhed at SpaceX returnerede efter fem uger i rummet – alt gik vel.

Næste gang vi måske hører noget, er hen over nytår hvor SpaceX forventer at fyre 4 raketter afsted på 2 mdr. og hvor de satser på at lande med første trin. Men ellers er det jo til stadig undren at de har en offentlig liste over forventede afgange mod rummet, når de ikke rigtig opdaterer når der sker ændringer i fartplanen. https://twitter.com/spacex

Opdatering 28. oktober: Anderledes uheldig var konkurenten der sprang i luften https://twitter.com/hashtag/Antares?src=hash og straks nåede alverdens forsider.

Opdatering den 31. oktober: crash of Virgin Galactic’s SpaceShipTwo rocket plane – The test flight was the 55th flight of the SpaceShipTwo vehicle, and the craft’s 35th free flight. It was the fourth time SpaceShipTwo had fired up its hybrid rocket motor in flight, and the first powered mission since Virgin Galactic and Scaled Composites, the spacecraft’s builder, switched from a rubber-based propellant to a plastic-based fuel mix.

After its release from the mammoth WhiteKnightTwo mothership, the rocket plane was supposed to fire its rocket motor then configure its wings to glide back to Earth for a landing on a runway at Mojave, Calif., where it took off under the WhiteKnightTwo carrier craft.
Officials decided this spring to modify the space plane’s rocket motor to use a different type of fuel. Instead of burning a rubber-based fuel mix known as HTPB used on SpaceShipOne and SpaceShipTwo’s initial test flights, Virgin Galactic selected a new propellant grain known as polyamide which officials said offered improved performance.

“This was a new fuel formulation that had been proven and tested on the ground many times,” Mickey said in a press conference.

Mickey described the change as a “small nuance to the rocket motor design.” “We were flying a rocket motor today that had been thoroughly tested on the ground and had been through a qualification series, and we expected no problems with the motor,” Mickey said.

The hybrid rocket motor burns the solid fuel with nitrous oxide — laughing gas — as an oxidizer.

http://ing.dk/artikel/halerors-manoevre-fik-virgin-rumskib-til-braekke-i-stykker-172018

Den foreløbige undersøgelse viser at haleroret brød sammen, mens motor blev fundet indtakt.

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