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SpaceX nails triple booster landing after satellite delivery

bbc.com

41–50 of 128 posts

Re: SpaceX nails triple booster landing after satellite delivery

#41
post #38

This really looks good for launch costs long-term. The Heavy costs $90 million per reusable launch with a 64,000 kg payload, or $1400 per kilogram.[1] Current versions of the Falcon 9 and Heavy can fly ten times with virtually no refurbishment between flights.[2] The only part they throw away is the $7.5 million upper stage.[3] Their expendable cost is $150M and they haven't really started reusing yet, so if they act…

the fully reusable falcon heavy can IIRC only lift about 8000kg to LEO. expendable is volume-limited but if you want to lift a concrete block, you can :)

Re: SpaceX nails triple booster landing after satellite delivery

#43

There's a great media thread on reddit where people post their own photos and videos: https://www.reddit.com/r/spacex/comments/bbhz9a/rspacex_arab... Here's a great video of the entire flight and landing of the side boosters in one shot, made with custom tracking software: https://www.youtube.com/watch?v=cEZZkEXAD6Q

The boostback burns in that video are amazing. Lots of dynamics in what looks like a shock-induced interface of the rocket exhaust and hypersonic atmosphere.

Re: SpaceX nails triple booster landing after satellite delivery

#44
post #41
post #38

This really looks good for launch costs long-term. The Heavy costs $90 million per reusable launch with a 64,000 kg payload, or $1400 per kilogram.[1] Current versions of the Falcon 9 and Heavy can fly ten times with virtually no refurbishment between flights.[2] The only part they throw away is the $7.5 million upper stage.[3] Their expendable cost is $150M and they haven't really started reusing yet, so if they act…

the fully reusable falcon heavy can IIRC only lift about 8000kg to LEO. expendable is volume-limited but if you want to lift a concrete block, you can :)

Reusable is 8000kg to GTO, not LEO. LEO performance in fully reusable configurations is 30+ tons.

Re: SpaceX nails triple booster landing after satellite delivery

#45
post #41
post #38

This really looks good for launch costs long-term. The Heavy costs $90 million per reusable launch with a 64,000 kg payload, or $1400 per kilogram.[1] Current versions of the Falcon 9 and Heavy can fly ten times with virtually no refurbishment between flights.[2] The only part they throw away is the $7.5 million upper stage.[3] Their expendable cost is $150M and they haven't really started reusing yet, so if they act…

the fully reusable falcon heavy can IIRC only lift about 8000kg to LEO. expendable is volume-limited but if you want to lift a concrete block, you can :)

[deleted]

Re: SpaceX nails triple booster landing after satellite delivery

#47

Here's the video cued up to the booster landings: https://youtu.be/TXMGu2d8c8g?t=1643 with the main core landing a few minutes later. If it's not obvious, the main core landing was much harder this time around, because of how fast it was going due to the two boosters imparting a lot of extra speed on it before they separated. If you think about it, it'll have somewhere between 1x and 3x the velocity of a normal Falco…

It doesn't necessarily make it harder. There's a burn to slow the booster down for re-entry, and having the side boosters do a lot of the work means more fuel / delta-v can be saved to slow the core booster.

The FH is apparently capable of 8,000kg in a reusable GTO launch ( https://en.wikipedia.org/wiki/Falcon_Heavy#Capabilities ), and this satellite was only 6,000kg. So it looks like there would be plenty of fuel available to slow the core down well below the survivable maximum.

Re: SpaceX nails triple booster landing after satellite delivery

#49
post #31
post #24

Earlier quoted context omitted.

It's an interesting issue with the fairings, and I'm interested to see what (or if) they're going to solve the issue with the saltwater contaminated fairings. Being a SpaceX launcher, as the article indicates, means they can accept higher risks, but in turn has a greater financial risk to the company. It's times like this where I'm glad SpaceX is a private company.

According to a reddit thread they've saltwater hardened the fairings and now they can reuse them: https://www.reddit.com/r/spacex/comments/bc8105/arabsat6a_el... The first reuse mission seems to be an internal one though.

That's just speculation, I wouldn't cite it as an authoritative source.

Re: SpaceX nails triple booster landing after satellite delivery

#50
post #42
post #16

Not only that, but apparently they recovered both fairings: https://www.google.com/url?sa=t&source=web&rct=j&url=https:/... So 5 out of 5...

I guess salt water isn't that much of an issue after all?

I think that is only an issue with hard to clean equipment, like engines.
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