Honda successfully launched and landed its own reusable rocket
-
Apparently they got it right on the first try.
Now that's the real win.
-
Not just for hard drives anymore.
What an ad. This is the second greatest YT video ever made.
-
Whatever they tested it's probably proof of that, but such a small rocket and only 300 meters means that a lot of things were not really proven, because scale is a HUGE issue.
Just ask Elon Musk / SpaceX, the Falcon rocket is fine, but Starship is horrible. And the difference is scale.That is not why starship fails. Starship fails because like everything that Elon does lately it emphasizes style over practicality. Starship is a very badly designed rocket that looks cool to Elon. Not unlike the Cyber truck which has been an abject failure in every way possible.
-
I know Blue Horizon or whatever it's called has had minor success with rockets. What's stopping Honda from out-competing them? Could it be a funding problem? (I know Blue Horizon has a lot of Amazon funding)
Well yeah, blue origin has already successfully orbited their rocket. Their rocket which has a 45 ton to low earth orbit payload capacity, about the same as the Saturn V (so actually impressive as fuck).
So the head start is what keeps Honda from out competing them. They're at least 10 years ahead of Honda (but likely more). And BO is solely focused on space, Honda on the other hand isn't going to prioritize that arm of development over others. So I can't really see Honda winning that sprint, if they're not totally committed to the race.
-
It's the only planet we can terraform (As in repairing some of the damage we've done), we are nowhere near able to terraform Mars, not even theoretically and disregarding cost.
Maybe in a century we can. But only maybe.Hypothetically, we could terraform Venus. At the very least, it shares a lot of the issues that we're trying to fix on Earth, just dialled up to 11 - its main problems are that it's way too hot, the atmosphere has way too much carbon in it (96.5% vs Earth's 0.04%), and the atmosphere has way too much sulfur (0.015% vs Earth's 0.00000002%, making the atmosphere highly acidic). So if for example scientists had an idea for causing a chain reaction in a planetary atmosphere that rapidly sequestered all atmospheric carbon but were worried about unknown strength or side effects, instead of testing it on Earth where it could kill us all, they could test it on Venus where any failures would have no serious consequences. And if it worked, not only would it mean that we fix climate change on Earth but we partially terraform Venus into the bargain.
Venus has roughly similar gravity to Earth and has a ferrous core which could hypothetically be turned molten (and therefore ferromagnetic) to provide the same kind of magnetosphere that Earth's core does. Mars has neither of these things and would therefore never be able to sustain human life naturally - Venus potentially could. On Mars, the atmosphere is just one of many obstacles. On Venus it's THE obstacle. Solve the atmosphere, you solve Venus.
-
An alternative to.space junk clogging up the sky would indeed be nice.
Well this wouldn't be that. It would be a competitor to space junk, so increase the number of satellites in orbit by say 25%.
-
Hypothetically, we could terraform Venus. At the very least, it shares a lot of the issues that we're trying to fix on Earth, just dialled up to 11 - its main problems are that it's way too hot, the atmosphere has way too much carbon in it (96.5% vs Earth's 0.04%), and the atmosphere has way too much sulfur (0.015% vs Earth's 0.00000002%, making the atmosphere highly acidic). So if for example scientists had an idea for causing a chain reaction in a planetary atmosphere that rapidly sequestered all atmospheric carbon but were worried about unknown strength or side effects, instead of testing it on Earth where it could kill us all, they could test it on Venus where any failures would have no serious consequences. And if it worked, not only would it mean that we fix climate change on Earth but we partially terraform Venus into the bargain.
Venus has roughly similar gravity to Earth and has a ferrous core which could hypothetically be turned molten (and therefore ferromagnetic) to provide the same kind of magnetosphere that Earth's core does. Mars has neither of these things and would therefore never be able to sustain human life naturally - Venus potentially could. On Mars, the atmosphere is just one of many obstacles. On Venus it's THE obstacle. Solve the atmosphere, you solve Venus.
Hypothetically, we could terraform Venus.
Mars is the best option we have, which is why I mentioned that. Venus already has selfenforcing runaway global warming, and we can't even land a probe there, because the environment is extremely hostile.
Mars is by far the easier option. -
That is not why starship fails. Starship fails because like everything that Elon does lately it emphasizes style over practicality. Starship is a very badly designed rocket that looks cool to Elon. Not unlike the Cyber truck which has been an abject failure in every way possible.
You are missing the point that size makes a difference. Obviously SpaceX has the technology to do what Honda did, but SpaceX can do ti with a real rocket.
But they can't do it with the bigger Starship rocket. Scale matters. -
It's actually interesting how similar rockets and jet engines are. You could think of a rocket as a jet (or sometimes two jet engines) where the afterburner is always on and the air intake is replaced by an O2 tank..
a rocket is a wingless airplane IMO
Edit: with oxygen tanks, as you said.
-
Imo it's a good thing tho. Spreading our civilization across multiple planets is the only way to guarantee long long term success. Obviously we should also fix the climate change issue (and many others). But still, being spread across the solar system would give our species redundancy. An extinction event on earth like a large meteor strike would no longer be the end.
While what you said is true,
i guess that most people's motivation is rather the economic benefits. Think of it this way:
The 1960s space race created jobs all across the US and inspired a generation of scientists.
Mars settlement could do the same, but bigger. At least that's the idea.
-
The issue is not going up, it's going over. If we only cared about the private sector getting people into space, that happened on a fully reusable vehicle twenty years ago.
The problem is getting things to stay in space. Not trying to Elon-stan here, but getting a rocket into orbit is many fold more difficult than just getting into space.
Yeah, if by "going over", you mean accelerating in the horizontal direction, then you're right.
Just to illustrate this: Consider we want to put 1 kg of mass into orbit.
First, we have to raise it by 100 km. That requires 1e6 J = 1 MJ of energy (formula is m*g*h).
Then, we have to accelerate it sideways, to a speed of 8 km/s. The energy to do that is 32 MJ (formula is ½*m*v²).
So, most of the energy (97%) is actually in the sideways movement.
-
How does Helium fit through places that Hydrogen can't even though its bigger? Is it because Hydrogen would react with things along the way while Helium won't?
I suspect it's because the hydrogen molecules are bigger than a single helium atom, which doesn't form molecules (since it's a noble gas).
So the hydrogen molecule only seeps through if it's oriented right (since the hydrogen molecule is a stick-shaped molecule).
-
Well they have been making crotch rockets for a long time.
isn't that Hitachi?
-
This post did not contain any content.
The Top Gear Reliant Robin launch reached 3000ft / 900m, although they were unable to stick the landing.
-
Unfortunately, the next competitor will be Amazon...
And then we'll see what happens next, getting a whole constellation up is no small feat, I can't see a third company getting a system working before 2050.
Also with starlink even one company's constellation is causing issues with astronomers and launches.
How bad will it be if there are 5-6 different companies with their own network floating around up there. And then other countries with their own network.
-
What the F is every corporation's boner with rockets?
Reusable rockets, in particular.
Imagine having a reusable car in a world where they were all disposable.
-
This post did not contain any content.
My buddy’s 2 million mile ‘95 civic says this is a sure bet
-
You are missing the point that size makes a difference. Obviously SpaceX has the technology to do what Honda did, but SpaceX can do ti with a real rocket.
But they can't do it with the bigger Starship rocket. Scale matters.Size is only a proof of logistics. Not tech. Physics don't change fundamentally between 6 meters and 120 meters. You learn a lot from scale modeling without the added costs. Starship's real challenge is actually the logistics necessary to fulfill the desired specifications and experimenting with engineering to reach the scale. The most innovative aspect of Starship would be orbital refueling, and they aren't there since the thing hasn't reached orbit yet. SpaceX problem right now is insisting on high turnover engineering, which doesn't work at scale without heavy costs, because it is a logistic problem, not a engineering problem.
-
This post did not contain any content.
Honda giving a whole new meaning to crotch rocket.
Oh wait, it's an actual rocket! -
Unfortunately, the next competitor will be Amazon...
And then we'll see what happens next, getting a whole constellation up is no small feat, I can't see a third company getting a system working before 2050.
The satellite constellation is the natural consequence of cheaper rockets. It's a true paradigm shift, but the pioneer in this case has only the moat of being able to spend less money per launch. If someone else can deliver payloads to low earth orbit for less than $2,000/kg, then they'll easily be able to launch a Starlink competitor.