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SpinLaunch catapults satellites into orbit without using a drop of fuel
(www.thebrighterside.news)
this post was submitted on 23 Jun 2025
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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.
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.
the package could definitely include a small booster engine to circleize its orbit, but that would add more complexity.
It also invalidates their "without a drop of fuel" claim.