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SpinLaunch catapults satellites into orbit without using a drop of fuel (www.thebrighterside.news)

submitted 1 week ago by cm0002@lemmy.world to c/positive_news@lemmy.ca

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[–] CanadianCorhen@lemmy.ca 9 points 1 week ago (1 children)

Very dubious of this technology. It would take an insane amount of energy to spin it up, a near perfect vacuum, and put incredible stress (something like 10k G's!) on whatever is being accelerated. On top of that, it would have the most velocity at the lowest elevation, where the atmosphere is thickest.

I would love to hear that they make it work, but wouldn't put my money behind it.

[–] BradleyUffner@lemmy.world 2 points 1 week ago* (last edited 1 week ago) (1 children)

Not only that, but you need to accelerate at or near apogee in order to achieve orbit or your path will be ballistic and you're going to hit the ground again. That's a fact of physics that can't be changed. Something without an engine or fuel can't do that.

[–] CanadianCorhen@lemmy.ca 1 points 1 week ago (1 children)

the package could definitely include a small booster engine to circleize its orbit, but that would add more complexity.

[–] BradleyUffner@lemmy.world 2 points 1 week ago

It also invalidates their "without a drop of fuel" claim.

[–] remon@ani.social 1 points 1 week ago* (last edited 1 week ago)

They haven't launched anything into orbit, yet. And entire concept smells of tech-bro grift.

[–] leastaction@lemmy.ca 1 points 1 week ago

I wonder where they think the energy to power this thing comes from.