SpaceX Falcon 9 / Dragon 2 : SpX-DM2 : May 27, 2020 : DISCUSSION

[FutureSpaceTourist]

twitter.com/djsnm/status/1265741635519832065

So now I'm wondering, if they allowed a 10 minute delay for weather would the booster have enough performance to manage the dogleg and reach the ISS?

https://twitter.com/astro_g_dogg/status/1266022683860447232

Nope

twitter.com/djsnm/status/1266026836074459136

Really? My Back of the envelope shows that they have on the order of 10 tons of upper stage propellant margin from using ASDS rather than RTLS for booster recovery. Enough on paper, what other considerations break it?

https://twitter.com/astro_g_dogg/status/1266156515771195392

Yes, the decrease in prop margin required to yaw steer out of plane becomes prohibitive for even a few seconds delay. So the launch window for F9 ISS missions is instantaneous.  The shuttle had a few minutes of wiggle room but that was all.

[Steven Pietrobon]

Isnt that the hatch to go into the space staton? I was under the impression that the toilet is under the 4 seats up top. The middle bottom seat is take out for the toilet and the other two seats have sleds for cargo or change out for the extra seats.

I believe the toilet is behind a panel next to the top hatch. Its indicated with the symbol below.

[woods170]

Isnt that the hatch to go into the space staton? I was under the impression that the toilet is under the 4 seats up top. The middle bottom seat is take out for the toilet and the other two seats have sleds for cargo or change out for the extra seats.

I believe the toilet is behind the panel next to the top hatch. Its indicated with the symbol below.

Correct. And yes, the toilet facilities are suited for both male and female anatomy.

[trebloc]

Any backup dates for after Sunday if they don't get away. I cant find anything?

[kevinof]

3rd and 4th I heard.

 

Any backup dates for after Sunday if they don't get away. I cant find anything?

[friendly3]

Isnt that the hatch to go into the space staton? I was under the impression that the toilet is under the 4 seats up top. The middle bottom seat is take out for the toilet and the other two seats have sleds for cargo or change out for the extra seats.

I believe the toilet is behind the panel next to the top hatch. Its indicated with the symbol below.

Correct. And yes, the toilet facilities are suited for both male and female anatomy.

Is there a removable curtain or something like that for some privacy?

[rdale]

Any backup dates for after Sunday if they don't get away. I cant find anything?

Not formally - but informally 6/3 - 6/4. The weather pattern takes another shift so offhand those look like viable options if this weekend doesn't. work.

[rdale]

Morning weather update...

I'm feeling the same about tomorrow as I did about Wednesday - and only 15 minutes was what it took to ruin a forecast 5 days ahead of time in Florida so there's that

Obviously there are no potential tropical storms (as of now - that may change in an hour) so it's a more typical Florida pattern. That being said, the sea breeze is a little slow to set up. So even if we're lucky enough to stay dry at the pad, the line of storms that typically forms along that breeze could be too close over Titusville. That would violate lightning rules and possibly anvil rules too.

1 - Surface winds
2 - Upper air winds
3-4-5 Various model forecasts of the radar tomorrow. Not gospel - but the fact that they aren't plastered with colors is a good sign.

[Orbiter]

50/50 odds are about as good as you can get in this type of weather pattern, so I'll take it!

Next week does look quite a bit less dynamic, tho... unless a tropical storm decides to make itself known again.

[daedalus1]

Not a good place to have a spaceport. I can't think of any instance a manned Soyuz was delayed by the weather.

[rdale]

Not a good place to have a spaceport. I can't think of any instance a manned Soyuz was delayed by the weather.

There aren't as many thunderstorms in Chicago but I can think of reasons that's probably not a good launch site. And that's not really germane to the discussion.

Today's weather will be a fairly good proxy for tomorrow. I'll keep an eye on the radar this afternoon and see how things go. I also found a potential data source to the field mills that would have helped last time...

[spacenut]

Any snow storms or high winds where Soyuz is launched?  Or extremely cold weather?

Boca Chica may be no better than the Cape.  They have high winds, thunderstorms, and sometimes hurricanes too.

[Eagandale4114]

Any snow storms or high winds where Soyuz is launched?  Or extremely cold weather?

Yes. TMA-22 launched in a blizzard.

[abaddon]

Not a good place to have a spaceport. I can't think of any instance a manned Soyuz was delayed by the weather.

On the other hand, NASA doesn't have to drop expended stages on anyone's head or lease/occupy their launch site from another country.

[Orbiter]

https://twitter.com/jeff_foust/status/1266379516584345601

Highlights of that press conference:
• This is a test flight
• Watching the weather, another briefing later today
• This is a test flight
• Maybe could launch on June 2 or 3 if this weekend is scrubbed
• Did you know this is a test flight?

I must be losing my marbles, because I thought the backup dates were June 3 and June 4.

[rdale]

Those were guessers from Twitterologists.

[cebri]

Probability of no go because of the weather has improved. From 60% to 50% on Saturday, and from 60% to 40% on Sunday. Let's hope it continues to improve. 

[jpo234]

Not a good place to have a spaceport. I can't think of any instance a manned Soyuz was delayed by the weather.

I'm pretty sure a Soyuz would have launched on the 27th. They launch into freaking snow storms.

[Herb Schaltegger]

This thread isn’t about what Soyuz does or doesn’t do.

[zubenelgenubi]

Moderator: Soyuz launch criteria are off-topic in this thread.