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Are we certain IFT-4 isn't going to do a engine relight?  I know they didn't state it in this announcement, but anything more solid than that?  They've got to demo that before they'll get an orbital license, so it's a high value test.

I suspect that getting data on the heatshield is priority and the long pole, as a fully reusable heatshield has never been done before. I don't think the relight is near a big deal as the heatshield is. They may have to take several steps back if the heatshield doesn't do it's job.
Iirc Shuttle TPS was intended to be fully reusable. In practice, it was something of a pig to maintain. It evolved during the operational lifetimes of the orbiters.

I imagine X-37 is fitted with a similar multiuse tiled system, but whether it is like final Shuttle tech or meaningfully evolved from there, they are not disclosing to outsiders like me.

SS heat tiles are also intended to be reusable, but Ship still has a tile retention issue. Unless someone tells me otherwise, Iím gonna classify it as potentially reusable.
The recent catastrophic accident in Baltimore puts a new light on the risks of collision between ship and station.

With the fragile ISS, did they do a crash analysis ever?

In hte case of my station, a starship would be far less massive, and would come out of the accidental collision with a 5m thick structure.  Even so, there should be a crash simulation done on the model.
Advanced Concepts / Re: Artificial Gravity Testbeds
« Last post by JohnFornaro on Today at 03:54 pm »
What's docked there?

Um, where's "there"? and what's "what"?

I'm not getting your question.
Advanced Concepts / Re: Artificial Gravity Testbeds
« Last post by JohnFornaro on Today at 03:49 pm »
(1) If you have to ask how much, you can't afford it, I guess.
Bad form
(2)Rather, it's quite silly of you to expect "firm fixed price"

(1) My guess is that it's proprietary info.  Plus, my name didn't start with an "M" and end with a "k".  No harm, no foul, no shade.

(2) Specifically asked for ballpark amount.

Advanced Concepts / Re: Artificial Gravity Testbeds
« Last post by JohnFornaro on Today at 03:44 pm »
Also not a "AG Testbed," so off-topic in this thread.  ;)

Huh.  When is a test bed not a testbed.  The point of my station, such as it is, is to "test" my hypothesis?
We have reached an impasse regarding the reliability of Lidia Midnight Rocket as a spaceflight source.  Further discussion is off-topic in this thread.

Drop it.  One post deleted.
ISS Section / Re: Schedule of ISS flight events (part 2) [Updates Only]
« Last post by Salo on Today at 03:11 pm »
Sunday, June 2

1:50 p.m.óDocking of the Boeing Starliner spacecraft to the International Space Station. Hatch opening and welcoming remarks by NASA astronauts Butch Wilmore and Suni Williams with the ISS Expedition 71 Crew at approx. 3:35 p.m.
SpaceX Facilities and Fleets / Re: Brownsville airport warehouse
« Last post by ChrisC on Today at 03:05 pm »
I came across something else while heading to this site last week. I was letting the car navigate me to the warehouse, when I rounded a bend and saw this. It looked at first very much like Starship tank parts, and I was like, oh am I already at the destination? No, I was still half a mile away. Upon closer inspection, these panels had more complex / compound curves than are used on Starship, definitely not cylindrical, so I think it was just another metal shop.

Today's NSF video compilation of Starbase activity (at 5m09s) shows forming jigs and sheet metal that look very much like these, with that airfoil / elliptical shape, so maybe these are Starship parts after all, and this is one of their suppliers.
Quote from: SpaceX
Upgrades derived from the flight test will debut on the next launch from Starbase on Flight 4, as we turn our focus from achieving orbit to demonstrating the ability to return and reuse Starship and Super Heavy. The team incorporated numerous hardware and software improvements in addition to operational changes including the jettison of the Super Heavyís hot-stage adapter following boostback to reduce booster mass for the final phase of flight.

The third flight of Starship provided a glimpse through brilliant plasma of a rapidly reusable future on the horizon. Weíre continuing to rapidly develop Starship, putting flight hardware in a flight environment to learn as quickly as possible as we build a fully reusable transportation system designed to carry crew and cargo to Earth orbit, the Moon, Mars and beyond.

So no reuse of the hot-stage adapter? Hopefully that is a temporary measure.

This may be the first time they jettison the ring, but itís not a new concept. Jettisoning the ring was discussed in the regulatory paperwork ahead of Flight 3.
ISS Section / Re: Expedition 71 thread
« Last post by Yellowstone10 on Today at 03:01 pm »
Got a new data point on Celestrak after this morning's burn - if I've done the math correctly, the station's orbit was increased from 413.6 km x 409.2 km up to 416.5 km x 410.9 km.

The altitude data on Celestrak after the second burn are a little jagged, but the first point after reboost had the station in a 419.3 x 412.3 km orbit, and the most recent point has it at 419.1 x 411.7 km.
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